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					Aqualog news                                                                                                                                                                                               NUMBER 41               4

   continued from page 1 : Waterlilies - Beauties for indoors and out                                            Tropica                               Tropica
                                                                                                                 Portrait                              Portrait
centimetre from the compost. If the               Waterlilies in the aquarium
rhizome needs to be cut, then disinfect           In contrast to outdoor culture, it may be         Nymphea lotus (zenkeri)                Nymphea pubescens
the cut surfaces with wood charcoal and
allow them to dry out before planting, in
                                                  preferable to suppress floating-leaf
                                                  growth in the aquarium. For this reason
                                                                                                    A beautiful and very varied species
                                                                                                    with leaves of green to red-brown
                                                                                                                                           If you don´t want this plant to form
                                                                                                                                           floating leaves, try pruning the
                                                                                                                                                                                                   Anzeige
order to prevent rotting. The growing             it is best to plant the lilies in a pure gravel   and varying numbers of purple          roots and removing the floating
tips must, however, be kept moist during          substrate and fertilise them occasionally         spots. Before forming floating         leaves. This keeps the plant young.
this procedure.                                   with CO2. Bear in mind that in the wild
                                                  these plants often die back at a certain
                                                                                                    leaves Nymphaea lotus (zenkeri)
                                                                                                    forms underwater leaves. If you
                                                                                                                                           A nutritious bottom encourages
                                                                                                                                           growth, as in all water lilies. A
                                                                                                                                                                                                   Messe
Which waterlilies for the pond
Garden centres and pet shops offer many
                                                  time of year and enjoy a rest period out
                                                  of water. If the leaves die off this does not
                                                                                                    don´t want floating leaves, prune
                                                                                                    the roots and leaves. The beautiful,
                                                                                                                                           solitary plant for large aquariums.
                                                                                                                                                                                                   Dresde
species and varieties. The wild species are
as a rule uncomplicated in their culture
                                                  necessarily mean the plant is dead. The
                                                  corm should be removed from the
                                                                                                    aromatic flowers can be fully
                                                                                                    appreciated in open aquariums. A
                                                                                                                                                                                                   n
and grow well. The hybrids often have
gorgeous flowers in a multitude of
                                                  substrate and kept for about 8 weeks in
                                                  clean water in a dark place at a tempe-
                                                                                                    nutritious bottom encourages
                                                                                                    growth. Often available in a red                                                               210 x 51
colours, but are not always winter-hardy.
There are also dwarf varieties, requiring a
                                                  rature of 16-18°C. In general the corm
                                                  will then sprout again when it is re-
                                                                                                    and a green variety. Recommended
                                                                                                    as a solitary plant for large                                                                  mm
water depth of only 20 cm, for the                planted in the aquarium.                          aquariums.
miniature pond.
                                                                                                    Tropica no. 019                        Tropica no. 018




                                                                                                    Family             Nymphaeaceae        Familiy            Nymphaeaceae
                                                                                                    Region                West Afrika      Region             South-east Asia
                                                                                                    Height                   20-80 cm      Height                   20-60 cm
                                                                                                    Width                    25-60 cm      Width                    20-30 cm
                                                                                                    Light           medium - very high     Light           medium - very high
                                                                                                    Temperature               22-30 °C     Temperature               22-30 °C
                                                                                                    Hardness                soft - hard    Hardness                soft - hard
                                                                                                    pH                          5-8 pH     pH                          5-8 pH
                                                                                                    Speed of growth           medium       Speed of growth           medium
                                                                                                    Demands                   medium       Demands                   medium



                                                                                                          EVERGREENS

                                                  Algae-eaters suitable for every aquarium
                                                  By Ursula Glaser-Dreyer

                                                  Algae are a natural feature of the underwater world, and hence we find algae in every aquarium. While a small amount of algae is
                                                  no cause for concern, it can be a nuisance if it gets out of hand. In such instances algae-eaters are a great help.


                                                  S    uckermouth cyprinids
                                                       The suckermouth cyprinids of the
                                                  genera Garra, Crossocheilus, Epalzeo-
                                                  rhynchus and Labeo are real "classics"
                                                  in the battle against unwanted algae.
                                                  All are, like the sucking loach                                                                                                                     Anzeige
                                                  (Gyrinocheilus aymonieri) specialised in                                                                                                            aquarix
                                                  eating algae from plants, stones, and
                                                  wood. All these species are best kept in          Garra sp.                                                             photo: F. Schäfer
                                                  groups of 5 or more individuals, but it
                                                  is important to research each species
                                                  individually before purchase. Some
                                      ®
                                                  Labeo species can grow to more than
      TROPICA
                                                  30 cm in length!             The majority,
     BankWood                                     however, remain significantly smaller,
                                                  with an eventual size of 6 -15 cm. A
  The Tropica® Aqua Decor range consists
  of plants grown on roots and stones,            relatively new star in the algae-eating
  making it easy to refresh and change the                                                          Crossocheilus latius                                                  photo: F. Schäfer
                                                  sky is the Indian algae-eater (Crosso-
  appearance of your aquarium as often
                                                  cheilus latius), which can consume
  as you like. The Tropica® BankWood
  range consists of pieces of tree root           huge amounts.
  which can be attached to the panes of
  your aquarium with a suction cup. An
  entirely new dimension, offering an             Characins
  infinite number of decorative options.          The best known fish for combating                                                                                                           Suckermouth catfishes
                                                  brown and tufted nuisance algae is the                                                                                                      The suckermouth catfishes of the
                                                  up to 12 cm long, bottom-dwelling,                                                                                                          genera Hypostomus and Glyptoper-
                                                  characin Parodon affinis, from Para-                                                                                                        ichthys, usually known as "plecs" or
                                                  guay. This species too is a shoaling fish.                                                                                                  "sailfin plecs", are amongst the most
                                                  It is intolerant of temperatures in                                                                                                         indomitable of algae-eaters. Unfortun-
                                                  excess of 26 °C and is thus unsuitable                                                                                                      ately all species are rather large, with
            Tropica Aquarium Plants               for the discus aquarium.                                                                                                                    an eventual size of well over 20 cm. On
    Box 3 · DK-8530 Hjortshoej · Denmark                                                                                                                                                      the other hand, these catfishes are
   Tel.: +45 86 22 05 66 · Fax: +45 86 22 84 66
  e-mail: tropica@tropica.dk · www.tropica.dk                                                       Parodon affinis                                      photo: H. J. Mayland/Archiv A.C.S.

                                                                                                                                                                                                             continued next page
Aqualog news                                                                                                                                                                                                                NUMBER 41                                  5

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                                                                                                                                                                                                      und                                                   oder
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                                                                                                                                                                                                      Beratung.                                         erfahrene
                                                                                                                                                     Wassergarten- und                                                                                  Anlernkraf
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                                                                                                      Großauswahl                                                                                                                                       Sie sofort
                                                                                                      an Aquarienmöbeln          Wetteraustr. 50, 61169 Friedberg                                                                                       anfangen.
                                                                                                      von einfachen bis                  Ortsteil Dorheim,                                                                                                  Bitte
                                                                                                      hochwertigen Qualitäten. Tel.: 06031-14820, Fax: 06031-9708                                                                                       bewerben
Glyptoperichthys gibbiceps                                             photo: Nakano/Archiv A.C.S.
                                                                                                                                         www.profi-zoo.de                                                                                                 Sie sich!
                                                                                                      Spitzenqualität
                                                                                                      japanischer Koi.                                                                                                                                    www.
                                                                                                      Schauaquarien                                                                                                                                     profi-zoo.
                                                                                                      in vielen Größen, auch                                        Ihr Spezialist                                                                          de
                                                                                                      eingerichtet zu                                               für optimal konditionierte
                                                                                                      verkaufen.                                                    Meeresfische und wuchsfreudige
                                                                                                                                                                    Korallen.



                                                                                                                                                          n e w s f l a s h
                                                                                                                                                          The red-nose shrimp from India
                                                                                                      (fs) Shrimps,crayfishes,and crabs are becoming increasingly popular in the aquarium hobby. A few years ago there were barely a dozen
                                                                                                      species available in the pet trade,but today there are more than 50 regularly offered. As a result exporters are constantly on the lookout
                                                                                                      for attractive and peaceful species new to the hobby. Deepak Nopany of Calcutta has scored a real hit with the Rednose Shrimp. These
                                                                                                      comical creatures, whose scientific name is as yet unknown, are very attractive, remain small (eventual size about 3 cm), are extremely
                                                                                                      peaceful, and enjoy nibbling at the nuisance algae in the aquarium. Aquarium Glaser has these very attractive shrimps available on a
                                                                                                      regular basis, so there is no further obstacle to their becoming more widespread in the hobby.


                                                                                                                                                                                                                               TIP
L255 is,like all Ancistrus, peaceful an d a perfect algae eater     photo: E. Schraml/Archiv A.C.S.                                                                                                                                                Shrimps,Cray-
                                                                                                                                                                                                                                                   fishes,and Crabs
                                                                                                                                                                                                                                                   Uwe Werner

                                                                                                                                                                                                      Shrimps,Crayfishes,and Crabs in              A ”must-have” for
robust, make no special demands as                 have a larval stage that develops in the                                                                                                           the freshwater aquarium                      everyone who is
                                                                                                                                                                                                                                                   interested in
regards water chemistry, and are also              sea, there is no fear of a massive
                                                                                                                                                                                                                                                   crustaceans for
very peaceful. Because in the wild                 population increase as with other                                                                                                                                                   + Poster
                                                                                                                                                                                                                                                   the freshwater
                                                                                                                                                                                                                           Advisory tructions by
                                                                                                                                                                                                                               instrus
                                                                                                                                                                                                                            care
                                                                                                                                                                                                                                   specialists
                                                                                                                                                                                                                                                   aquarium.
these catfishes often live in murky                snails.                                                                                                                                                                                         48 pages, full-
muddy waters, they are also suited for                                                                                                                                                                                                             colour poster
the high temperatures of the discus                Shrimps
                                                                                                                                                                                                     DM 24,80 / € 14,90
aquarium. These catfishes are the best             The renowned algae-shrimp (Caridina
                                                                                                                                                                                                              In your petshop or from
choice for anyone wanting an algae-                japonica) is particularly suitable for
eating companion for the king of the               planted aquaria with small fishes.
                                                                                                                                                                                                            animalbook.de
                                                                                                                                                                                                            phone: + 49 (0) 6106-69 79 77
aquarium.                                          Unfortunately larger fishes tend to                                                                                                                       fax: + 49 (0) 6106-69 79 83
                                                   regard it as an addition to their menu!
Snails                                             Like the Nerita snails mentioned above,
                                                                                                                                                                                                                                                           ✃
Many snails, such as the popular apple             these shrimps are not for open-topped
snails (Ampullaria) will indeed eat                aquaria - the snails will wander out,
algae, but also enjoy higher plants.               while the shrimps are fond of jumping




                                                                                                                L
One exception is the attractive Nerita             - and in both cases the outcome is
genus, imported from southeast Asia                usually fatal.
some time ago. Because these snails


                                                                                                                                   x
                                                                                                                                  e icon                                                                      of water chemistry

                                                                                                                      General or Total hardness
                                                                                                                      By general hardness is understood the total of all the alkaline ions dissolved in the water; in particular those of
                                                                                                                      calcium, followed by magnesium, account for well over 80% of the most important of such ions and hence are
                                                                                                                      the main components of general hardness. Because calcium is present in all the different calcium salts found in
                                                                                                                      water, a water that contains these salts is by definition a water with a high general hardness.


                                                                                                                      Water from dolomite, gypsum, or chalk regions is invariably hard water, while water from sandstone, basalt, or
                                                                                                                      granite areas contains little or no calcium and magnesium ions and is thus regarded as soft water with a low
                                                                                                                      general hardness. General hardness is measured in degrees; unfortunately English, French, and German
                                                                                                                      degrees differ in the amount of hardness they represent, but in the popular German scale, 1 ° dGH (deutscher
                                                                                                                      Gesamthärte, = German general hardness) represents precisely 17.8 mg of calcium carbonate per litre of water.

                                                                                                                      General hardness in the aquarium
                                                                                                                      The various salts that cause hardness, in particular those of calcium and magnesium, are essential components
                                                                                                                      of not only the fishes but also the plants in the aquarium. Calcium, in the form of calcium phosphate, is the most
                                                                                                                      important building block of the skeleton and scales. However, the currently increasing popularity of shrimps,
                                                                                                                      crayfishes, and snails, inter alia, as a natural control for algae, makes the presence of such minerals essential for
                                                                                                                      the formation of the chitinous armour and claws of the crustaceans and the shells of the snails. Plants primarily
                                                                                                                      require magnesium as the central atom of the green plant pigment chlorophyll. The importance of hardness-
Nerita sp. ”Zebra”                                                  photo: Archiv Aquarium Glaser
                                                                                                                      causing salts is even greater in the marine aquarium, where the constant addition of calcium carbonate is
                                                                                                                      required to ensure that the corals thrive.


                                                                                                                      The effect of general hardness in the aquarium
                                                                                                                      Many of the fishes kept in the freshwater aquarium originate from regions where the water is naturally very
                                                                                                                      soft, and thus very few calcium and magnesium ions are available. These include such well-known fishes as the
                                                                                                                      cardinal tetra, the discus, and most armoured catfishes.

                                                                                                                                               Because in the course of their evolution these fishes have adapted well to such water
                                                                                                                                               conditions, obtaining the minerals they require (calcium, magnesium) mainly from their
                                                                                                                                               food, it is essential, in the best interests of these fishes, that in hard water areas, we
                                                                                                                                               eliminate the hardness from the aquarium. There are three basic methods of achieving
                                                                                                                                               this: reverse osmosis, ion exchange, and the use of the liquid additive amtra trop. While
                                                                                                                                               the first two methods require the use of relatively expensive and maintenance-intensive
                                                                                                                                               equipment, all that is needed using amtra trop is a dose of 10-15 ml/100 litres in order to
                                                                                                                                               bind up the hardness components and prevent them from having any effect on the fish
                                                                                                                                               organism.
                                                                                                      ✃




Caridina japonica                                                      photo: Nakano/Archiv A.C.S.