No waiting to swim - treated water can be used immediately. Application: Dilute with at least nine parts of water. (See dilution chart on back of bottle.) Sprinkle solution around edge of pool. Chlorine, bromine and ozone sanitizers, as well as salt water pools. Apply under sunny conditions for most effective results. Apply initial treatment to a freshly filled pool or at first visible signs of algae growth. 1 Quart 4 Pack No waiting to swim - treated water can be used immediately. Application: Dilute with at least nine parts of water. (See dilution chart on back of bottle.) Sprinkle solution around edge of pool. Chlorine, bromine and ozone sanitizers, as well as salt water pools. Apply under sunny conditions for most effective results. Apply initial treatment to a freshly filled pool or at first visible signs of algae growth. 1 Quart 4 Pack Chemical standard type Algicide Brand GLB Pool chemical type Pool Algae Chemical Controllers Form Liquid Rec. use Swimming Pool Size 1 Qrt Weight 32 oz Pack quantity 0