Spa Perfect?s naturally based SMARTzyme technology and botanical extract formula powerfully yet gently biodegrades unwanted non living organic contaminants such as:? body oils ? cosmetics ? suntan lotions ? hair products and so much more!No more waterline rings clogged filters or cloudy unpleasant smelling water. Spa Perfect also works as a continuous cartridge filter cleaner.Spa Perfect InstructionsThis product is designed for use in properly balanced spa water.Use 1 oz per 100 gallons of spa water per week. One capful per week treats a 400 gallon spa. Use twice per week during periods of heavy use. Do not use with or immediately after shocking.Note: Sanitizer level should be below 5ppm before adding this product.