... removes ammonia and nitrite from pond water within shortest time, pollutant removal with immediate effect.

Due to colloids and vitamins, sera KOI PROTECT ensures the protection of the mucous membrane of your precious Koi and of other fastidious coldwater fish in your garden pond.

... prevents algae

sera pond crystal is a highly effective product that coagulates all cloudiness in pond water within short time so it can be collected by the filter.

sera pond bio humin regulates strong sunlight: It reduces irradiation into the pond by natural humic substances mildly and lastingly on a biological basis.

Natural product against cloudiness in garden and fish ponds.

The aquarium will take a deep breath

Protects against nasty surprises

pH lowering – but please be gentle

sera pond bio nitrivec, a sera biotechnology product, breaks down ammonium and nitrite due to the purification bacteria it contains.

sera pond filter biostart immediately activates the biological filter performance in new ponds, new filters and filter media as well as after cleaning the filter.