Frequently asked questions

Freshwater Technical equipment

How can I regulate the suction with the sera gravel washer?

Hello, you can regulate the water flow and, correspondingly, the suction by simply covering the free end of the hose partially with your thumb. Best regards sera GmbHDr. Bodo...

Freshwater Care

How can I lower the water hardness?

Hello, Concerning "lowering the GH level":this is within certain limits (some hardness degrees) possible with blackpeat granulate (sera super peat). More extensive lowering (e.g. for...

Freshwater Diseases

How can I help a fish with unspecific symptoms?

Hello, without specific disease symptoms you will unfortunately not be able to do much more than put the fish into a separate tank, provide plenty of oxygen in the water (possibly...

Freshwater Technical equipment

How can I build a bypass filter for denitrification?

Hello, the construction principle is actually very easy:all you need is a chamber equipped with intake and an outlet connectors, which is filled with sera siporax Professional [0.5...

Freshwater Pond Fish

How can I hibernate goldfish living in a pond indoors?

Hello, goldfish can hibernate in cold (4 - 6°C / 39 - 43 °F) water (in that case do not feed nor disturb them) Usually, temperatures inside the house (including the basement) are...

Freshwater Care

What is the best way to attach moss to a root?

Hello, this is only for a while - you can remove (cut and pull it out) the thread after a few weeks when the moss has grown on! I do not think there will be any problems if you...

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