Frequently asked questions

Freshwater Care

Does sera aquatan affect iron fertilization?

Hello, no, you do not have to worry. Fertilizers such as sera florena contain the iron in complexed form anyway, and plants can take it up in this form without any problems! Best...

Freshwater Care

Does sera blackwater aquatan contain formaldehyde?

Hello, yes, this is indeed the case - sera blackwater aquatan does not contain any formaldehyde. Best regards sera GmbHDr. Bodo Schnell

Freshwater Diseases

Does sera omnipur S harm the beneficial bacteria in the filter system?

Hello, the filter performance may decrease by a few percent, but not very strongly. Therefore it is recommended to top up filter bacteria with sera bio nitrivec after the disease...

Freshwater Care

Does sera phosvec bind phosphates permanently, or can they get back in solution in the aquarium?

Hello, Concerning "water change":due to the high stock the water changes should rather be carried out weekly! Concerning "phosphate precipitation":this is very likely, as the liquid...

Freshwater Technical equipment

Does the sera blue sky support algae growth, and is it suitable for planted aquariums?

Hello, Concerning "planted aquariums":this is actually possible. However, it is mainly used for aquariums with fish from open water (e.g. East Afrikan rift lakes) due to its color. ...

Freshwater Diseases

Dosage of sera ectopur

Hello, it is only applied once, 10 g (0.35 oz.) [two teaspoons each holding 5 g (0.18 oz.)] per each 25 liters (5.5 US gal.). In case you carry out a partial water change during the...

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