Features: 8 lbs Ideal for use in spas， hot tubs， and swimming pools. The powerful sanitizing chemical that will destroy bacteria， break down contaminants and control algae growth. Will keep your hot tub， spa or pool water sparkling clean and crystal clear. Will stand up to comparisons to Bioguard， Sun， Guardex， and Pace. Fast dissolving chlorine granules. Simply broadcast chlorine granules into your pool or spa. Contains premium-quality 56% available stabilized chlorine. 99.3% Sodium Dichloro-S-Triazinetrione Dihydrate. Available in a number of different quantities， ranging from 2 pounds to 500 pounds. We recommend treating 5，000 gallons with 1 oz daily.

Rx Clear 99.3% Sodium Di-Chlor Granular Swimming Pool Chlorine - (Choose Size)， 8 lbs