HTH Super 3 Inch Chlorine 4-in-1 Pool

25 Pound Tub<br>Condition: Brand New Factory Sealed.<br>Ships Same or Next Business Day!!<br>Place one tablet in pool feeder, floater or skimmer per 10,000 gallons of water every week or as often as need to maintain a chlorine residual of 1-4 ppm. Do not add directly to pool water; this can cause damage to pool surfaces. Be sure to run the pump at least 8 to 10 hours per day. Test pH and chlorine levels at least two or three times per week and adjust as needed. Multiple sizes available!<br>Ingredients: Trichloro-s-Triazinetrione 93.6%, Zinc sulfate monohydrate 3.5%<br>Other Ingredients: 2.9%<br>This chlorine sanitizer guards against bacteria, algae and other organisms to give you clean and clear pool water<br>One tablet treats 10,000 gallons of water for up to one week<br>Sun-protected chlorine tablets provide longer chlorine life and also contain built-in algae protection and clarifier<br>Can be used in feeders, floaters and skimmers; do not apply directly to water