Tetra Pond 16168, 3.3 OZ TetraAqua, Aquasafe Water Conditioner, Makes Tap Water Safe For Fish By Eliminating Chlorine & Heavy Metals Present In Municipal Water Supplies, Aquasafe Also Neutralizes Chloramine By Breaking Down The Bond Between Chlorine & Ammonia While Reducing Both Fish Toxic Chlorine & Ammonia Components, In Addition, Aquasafe Provides Slime Coating To Help Wounds Heal & Protect Fish Abrasion.