Tetra AquaSafe, to Turn Tap Water into Safe and Healthy Water for Fish and Plants, 5 LitreTetra 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 &