Frequently asked questions

Pond Care

Total hardness for keeping Koi

Hello, no, not at all. The common pond fish (Koi, goldfish, orfes, sturgeons etc.) can also be kept in hard water without any problems. A connection between hardness and coloration...

Freshwater Fish

Gender differences and fin filaments in angelfish

Hello, after all, there is only one really certain distinguishing characteristic (unless you could watch the fish while mating and thus know which one is male and which one is...

Freshwater Diseases

Swollen eye and abnormal swimming position

Hello, the fish eating normally makes an infection unlikely, since most infections cause severe loss of appetite. Is it maybe possible that the fish was being attacked vehemently and...

Freshwater Diseases

Ulcer on a dwarf gourami

Hello, possibly this is due to an infection with bacteria related to Aeromonas or Pseudomonas (-> sera baktopur direct), but an infection with fish tuberculosis (cannot be treated)...

Freshwater Care Fish

Is there a special sera salt for livebearers?

Hello, many livebearers indeed prefer harder water - hardening with sera mineral salt is therefore recommended if the original water is soft. Additional use of sera marin salt (salt...

Freshwater Fish Diseases

Goldfish got stuck, caudal fin is torn

Hello, the baktopur bath was correct and sufficient. Even large fin injuries heal almost completely if the fin root has not been damaged. Injuries of the fin base, however, may...

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