Includes one case (quantity of 3) of the Pool Frog 6.16 pound chlorine Pac that works with the Pool Frog XL Pro to easily chlorinate your pool without need to actually touch the chlorine tablets. Simply remove the tab and insert into the cycler, then adjust the cycler to dial in the correct amount of chlorine for your pool. The 6.16 lb. Chlorine Pac lasts 2-3 weeks depending on pool usage. Bac-Pac containers are recyclable when empty.