BioGuard Super Soluble is a quick dissolving chlorine concentrate. It is designed to eliminate bacteria without upsetting the balance of the pool water. This product leaves no residue to cloud the water and is safe for use in all types of pools. It has 56% available chlorine and is comprised of 97% active ingredients. The formula of this product has been proven to not lower pH. Super Soluble is an ideal choice for sanitizing small, above-ground pools, and in-ground vinyl-lined pools.