how many chlorine tablets at a time
One 3â³ chlorine tablet works for 5,000 gallons of water. For instance, if you own a 20,000 gallon pool, you would add 4 tablets to your skimmer basket(s). Always round up! If you own a 16,000 gallon pool, for instance, you would round up to 4 tablets. If you have a chlorinator, however, this doesnât matter â you just fill that bad boy up as much as it will hold, and control the amount of chlorine thatâs added using the dial on the unit.