Frequently asked questions

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 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 or 60 liter tank, which is fine for many small fish and shrimps, but is actually too small for...

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...

Freshwater Care

How can I remove spot algae growing on the aquarium glass?

Hello, there are suitable cleaning utensils (sera glas clear TA6, sera glass cleaner, sera scraper) for removing these spot shaped green algae and other layers on the panes. The sera...

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