Frequently asked questions

Freshwater Technical equipment

How is a fluorescent tube constructed and what do you have to observe during operation?

Hello, fluorescent tubes are widely distributed in the aquarium hobby. They are a standard light source for almost all aquariums. A fluorescent layer (a so-called "phosphor"; this...

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Freshwater Technical equipment

How noisy is the sera fil external filter?

Hello, the sera fil external filters are very quiet - they are hardly noticed during normal operation. Of course they should be placed resonance free, furthermore make sure the...

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Freshwater Technical equipment

Internal filter sera F 400 - is it possible to redirect the water current?

Hello, the instructions for use can be downloaded from our web site, and of course we also e-mail them on request! The filter must indeed be completely submerged. You can redirect...

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Freshwater Technical equipment Care

Is it normal that the tablet quickly dissolves within the sera CO2-Start reactor?

Hello, this is normal and correct. The CO2, however, diffuses slowly through the reactor wall. It therefore gets into the aquarium well dosed and not at once. Best regards sera...

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