Tetra Aquasafe Is A Water Conditioner That Immediately Transforms Aggressive Tap Water Into Near-Natural Aquarium Water Suitable For Fish -A Now New With Bioextract For Healthy And Clear Water. + Tetra Aquasafe Neutralises Substances In The Tap Water That Are Harmful To Fish: Elimination Of Chlorine As Well As Highly Effective And Permanent Binding Of Heavy Metals Such As Copper, Zinc And Lead + Adds Essential Substances From The Fish'S Natural Habitat That Tap Water Cannot Provide: Iodine For Vitalisation Of The Fish, Magnesium To Promote Growth And Well-Being, Vitamin B To Combat Stress + Gills And Mucous Membranes Are Effectively Protected By Noticeable Care Colloids In Tetra Aquasafe + The New Bioextract Formula With Natural Biopolymers Promotes The Growth Of Useful Bacteria For Healthy And Clear Water