Aqualog news NUMBER 41 4
continued from page 1 : Waterlilies - Beauties for indoors and out Tropica Tropica
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
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
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.
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
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.
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
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
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: firstname.lastname@example.org · 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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für gesunde für klare Teiche, Als
Nachzuchtfische. durch zeitge- vielseitige
mäße Technik Fachkraft
Wassergarten- und Anlernkraf
Aquaristikhaus t können
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!
japanischer Koi. www.
in vielen Größen, auch Ihr Spezialist de
eingerichtet zu für optimal konditionierte
verkaufen. Meeresfische und wuchsfreudige
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.
L255 is,like all Ancistrus, peaceful an d a perfect algae eater photo: E. Schraml/Archiv A.C.S. Shrimps,Cray-
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
regards water chemistry, and are also sea, there is no fear of a massive
very peaceful. Because in the wild population increase as with other + Poster
Advisory tructions by
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.
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
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
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
Caridina japonica photo: Nakano/Archiv A.C.S.