|Jack's Super Pacs are a highly concentrated enzyme cleaning product. One pouch treats up to 80,000 litres for 2 weeks. Super convenient application method - just drop in the skimmer basket. Can also be used in hot tubs. Powerful enzymes clean water of organic waste. Dead algae/biofilms, pollen, pollutants, greases, oils, bather wastes, etc are digested quickly and efficiently, leaving water clarity restored. No negative effects to water balance as a result of using Jack's Super Pacs. Simple, Effective, Affordable.