Spa Choice Sanitizing Granules Hot Tub Chlorine 5-Pounds, 4-Pack

New in box. Spa Choice 472-3-5081-04 Sanitizing Granules Hot Tub Chlorine 5-Pounds, 4-Pack DIRECTIONS FOR START-UP (FRESHLY FILLED) 1. Turn on the circulation system and ensure that it is operating properly. 2. Add 6 teaspoons of this product for each 500 gallons of water. Check the free available chlorine (FAC) and, if below 4-5 ppm, repeat as needed. Re-entry into treated spas is prohibited above levels of 3 ppm of chlorine. DIRECTIONS FOR REGULAR USE: Turn on the circulation system and ensure that it is operating properly. Scatter approximately 3 teaspoons per 500 gallons of this product over the surface of water. Always use a clean dry spoon. Test for FAC and add additional product, if necessary, to attain 4-5 ppm FAC. Maintain 1-3 ppm FAC while the spa or hot tub is in use. After each use, shock treat with 9 teaspoons per 500 gallons water to control odors and algae. Repeat as needed. Re-entry into treated spas is prohibited above levels of 3 ppm of chlorine.