The FROG Leap 2.4 pound Torpedo Pac works with the FROG Leap above-ground mineral system, Pool Frog in-ground cycler model 5400 and above-ground cycler model 6100 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 2.4 lb. Bac-Pacs of chlorine last 1-2 weeks depending on pool usage. Bac-Pac containers are recyclable when empty.