Frequently asked questions

Freshwater Care

What to do in case of brush algae?

Hello, the following approach is effective in the long run:regulate the ratio betwen nitrate and phosphate in a way that the plants are just sufficiently provided with nitrogen and...

Freshwater Care

What to do in case of floating algae in the aquarium?

Hello, reducing the nitrite value is of course good, since nitrite is very toxic for fish. However, it has nothing to do with algae growth. As an immediate measure, you can bind the...

Freshwater Care

Which fertilizers are suitable in case of diminished plant growth?

Hello, if it is really caused by lacking minerals, sera florena (liquid) is recommended for stem plants, sera florenette (tablets) for plants with strong roots such as Echinodorus sp...

Freshwater Care Technical equipment

Which filter material for anaerobic nitrate breakdown / Slow flux bypass filter?

Hello, sera siporax Professional or, in small filters, sera siporax mini Professional are ideal suited for this purpose! Best regards sera GmbHDr. Bodo Schnell

Freshwater Care

Which measuring range and which steps does the sera pH test kit have?

Hello, the measuring range is from pH 4.5 to pH 9.0 - the steps are each 0.5 pH units. Best regards sera GmbHDr. Bodo Schnell

Freshwater Care

Which plants are suitable for an aquarium with Goldfish and Koi?

Hello, mainly hard species such as Anubias spp. are suitable - these usually also tolerate the lower temperatures without problems. Harder pond plants are generally also suited, but...

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