The JMMAGENTA032 Magenta Metal Solution 32oz is a fast-acting and long-lasting product develop by Jack's Magic Products which helps removes stains and scale as well as protects all pool finishes from scaling and staining. This is the most advanced start-up and stain-fighting product that you can use for achieving a beautiful stain-free pool. This product helps control plaster dust and is highly effective in all pool sanitizer systems including salt chlorine generators. It can even clean and prevent scaling of salt cells which helps in extending cell life and it will also not yield phosphates. It is recommended to use 1 quart per 15,000 gallons of water for initial dosage and 6-8 ounces per 15,000 gallons for the succeeding weekly maintenance.