The Magenta Stuff is the most advanced start up and stain-fighting product available for a beautiful stain-free pool. The Magenta Stuff is 50% Stronger than other leading products; 1 quart treats 15,000 gallons. Fast-acting and long-lasting, this great product helps removes stains & scale and protects all pool finishes from staining & scaling. The Magenta Stuff is GREAT FOR START UPS; it helps control plaster dust. Highly effective in all pool sanitizer systems including salt chlorine generators, The Magenta Stuff cleans and helps prevent scaling of salt cells, helping to extend cell life; it also will not yield phosphates.