Frequently asked questions

Freshwater Diseases

White spots on the fish?

Hello, white spots are almost always a symptom of Ichthyophthirius multifiliis, often simply called "Ich", one of the most frequent fish diseases in aquariums. The disease is very...

Freshwater Fish

Black Ghost Knifefish (Apteronotus albifrons) in a community tank? / Fish as gifts?

Hello, Concering "keeping":this will not be possible in the long run, since knifefish are rather greedy predators. Concerning "eat smaller fish":this will certainly happen! However,...

Freshwater Technical equipment Care

Which CO2 unit for a 60 cm (23.6 in.) aquarium?

Hello, our sera CO2-Start with the corresponding sera CO2-Tabs plus is ideal for aquariums of this size - this system has been developed precisely for this kind of use! Best regards...


Which size for a beginner's tank?

Hello, the general rule is: the bigger, the better. Most aquarists start with a 60 cm (23.6 in.) or 60 liter (13.2 US gal.) tank, which is fine for many small fish and shrimps, but...

Freshwater Fish Food

Which food is suitable for Ancistrus catfish, Platies and Mollies?

Hello, in particular, sera Catfish Chips, sera Spirulina Tabs and sera Viformo are suitable for the catfish. sera Flora, sera GVG-Mix, sera Spirulina Tabs (attached to the aquarium...

Freshwater Technical equipment

How can I remove scratches in the aquarium glass?

Hello, on the outer side it may be possible to use a filler as it is, for instance, used for car glass. This, however, requires an experienced person! Glass polish may sometimes...

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