Puriclean 100g Tub cleans and purifies all stored water systems including tanks, containers and pipes. This is an essential safeguard to health! It cleans up to 90L (20 Gal) tank and has a unique dual-purpose formula which both cleans and sterilizes in one easy action. For water carriers/containers: simply pour the powder in and leave to soak with water for 1-12 hours or for tanks and complete water systems: dissolve the powder in a plastic container then add to the system. This effective water purifier is designed to purify all stored water systems, including tanks, containers and pipes. It's perfect for caravans and motorhomes, ensuring that you are protected from harmful bacteria and viruses. This 100g tub is easy to use and suitable for up to 15 gallons of water, making it a cost-effective and efficient solution to purifying your water system. 100g pack of water purifier Cleans and sterilizes Cleans complete water system - including tanks, pipes, pumps and taps Eradicates bacteria, viruses and fungi Purification Capacity: 15 gallons Recommended for caravans.