sera aquatan clarifies the water, binds heavy metals and neutralizes chlorine. It protects the mucous membrane of the fish by the valuable Vitamin b complex as well as skin protection colloids. sera aquatan is ideal to the stress reduction during the feed and using the fish. In a 45-minute-bad with three-way dosage works sera aquatan against acute poisonings by metal ions or ammonia.Toxic substances such as chlorine and heavy metals can get into the aquarium water with every water change. Even our well monitored drinking water often contains such substances in concentrations critical for fish and other aquarium inhabitants. sera aquatan immediately conditions tap water into fish friendly, healthy aquarium water. It removes harmful substances such as chlorine and chloramines, binds heavy metals (e.g. copper, zinc or lead) and protects against ammonia. At the same time, it adds important mineral substances in a bioavailable form to the aquarium water, which is to the benefit of fish, pla