Betta Relax & Safer specially can quickly get rid of residual chlorine from tap water and ammonia, and other harmful heavy metals in the water and the fishy odor of the water, to prevent water quality from aging spoilage Rich of EDTA, multi - vitamins and protection of glial available detoxification, release the fish environment pressure and restrain the bacteria in water, to protect fish mucous tissue on fish body surface and water plants foliage fiber, Betta Relax & Safer can stabilize the water quality in the Betta and tropical fish aquarium. During transportation, Betta Relax & Safer will reduce water pressure on fish body surface Plus aqua safer achieve the most suitable comfortable for the growth of fish & aquatic plants environment. Use Betta Relax & Safer when open new tank& after exchanging new water. Net Weight: 138ml USAGE&DOSAGE: Using for Betta Relax & Safer add 10ml/ 50L, Use once/week.