Tetra AquaSafe makes tap water safe for fish and reliably protects fish and plants against harmful substances contained in the water Its optimized vitamin B mix reduces any stress that fish may experience during water changes and therefore sustainably supports their health Tailored to the special needs of fishes’ skin & fins; iodine supports vitality, magnesium promotes growth & well-being of fish & plants; natural plant extract protects fish gills & mucous membranes The care product encourages the settlement and bioactivity of useful bacteria in the aquarium, which in turn ensure clean, healthy water; it dissolves quickly in the aquarium water It is suitable for all freshwater & marine aquariums; when using Tetra AquaSafe in marine aquariums, however, the protein skimmer should be switched off to prevent large amounts of foam from forming