Jacks Magic Natural Multi-Enzyme SUPER PACS are a unique blend of natural enzymes developed specifically for pools and spas. SUPER PACS combine the high performance of powerful multi-enzyme action with the biodegradable features of a truly green product. SUPER PACS break down oils, lotions, make up and other common organic pool and spa contaminants, preventing scum line build up and dull cloudy water. SUPER PACS are highly concentrated just one SUPER PAC treats up to 20,000 gallons of pool (or spa) water for 2 weeks. This product is easy to use simply drop in the skimmer basket and enjoy beautiful water!