Pool Mate 1-1415M All-in-1 Swimming Pool 3-Inch Chlorinating Tablets, 15-Pound Sanitizer, Clarifier, Stain Inhibitor, Algae Control, and Descale all in one 3" 8 oz. tab Each 3" 8 oz. tab is individually wrapped, stabilized, and slow dissolving Reduces the need for additional chemicals Weekly maintenance dosage is 1 to 3 tablets per 10000 gal. 15 Pounds (25 tabs)