HTH 1 Lb. Ultimate 7-in-1 Shock Granule

7-in-1 formula softens water, kills bacteria and algae, will not fade liner, crystal clear results in 24 hours, reduces eye irritation, prevents scale, and is fast dissolving. Provides Visible Blue Action. Calcium hypochlorite 56% and 44% other ingredients. Available chlorine 52.5%. Color code: Red.