Frequently asked questions

Freshwater Invertebrates

Which crabs are suitable for aquariums?

Hello, "Purple arm crabs", Pseudosesarma moeshi, or closely related species are probably the most common species offered in the trade. However, it is is advisable to add some salt...

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 Invertebrates Technical equipment

Which filter for a 30 liter (6.6 US gal.) shrimp tank?

Hello, the sera internal filter L 60 in combination with a membrane pump (sera air 110 plus) is optimal for this purpose! Best regards sera GmbHDr. Bodo Schnell

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 Fish

Which fish can be kept together with Fighting Fish?

Hello, calm and non-aggressive fish are suitable, e.g. harlequin rasboras or most common characin species, armored catfish, loricariids, coolie loaches etc. Better do not add...

Freshwater Fish

Which fish for reducing the number of Guppy fry?

Hello, almost all characins sized about 6 cm (2.4 in.) are suitable, e.g. from the Hyphessobrycon genus. Dwarf cichlids (mainly Apistogramma spp.) will also prey on the fry, some...

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