Frequently asked questions

Freshwater Fish

New gourami attacks older ones

Hello, this raises the suspicion that it possibly is not a female but a juvenile male! In case of open injuries, a mild anti-bacterial treatment (liquid sera baktopur) makes sense...

Freshwater Technical equipment

Nitrate breakdown with sera siporax: What kind of filter is suitable?

Hello, an external filter is possible. The filter type isn't that important - both internal and external setups will work just fine. The setup is pretty simple: the first step is...

Freshwater Care

Nitrite levels remains at 0.3 mg/l (ppm) for a longer time

Hello, the nitrite peak may indeed occur or be present later than after 4 weeks. Using a really highly active filter medium (sera siporax Professional) and a biostarter (sera bio...

Freshwater Care

Nitrite level remains very high for months

Hello, something is wrong with the filter if the nitrite level is still that high! The biological performance of internal and external filters is the same, provided the filters are...

Freshwater Diseases

Open wound on the head of a terrapin

Hello, yes you should. The vet has the treatments and the knowledge to treat open wounds as required. sera sanipur is suitable as an immediate measure for soothing and inflammation...

Freshwater Care

Conditioning R/O water with sera mineral salt for angelfish

Hello, this is possible without any problems, sera mineral salt has been developed exactly for this kind of purpose after all! I suggest about 5°dGH and a carbonate hardness of 3 -...

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