Eliminates algae and bacteria in your drinking water containers, water tanks and supply systems with only 100ml of solution required per 20L of tank capacity! Pro-Kleen's powerful Fresh Water Tank Cleaner effectively removes unwanted calcium build-up and other deposits from your storage tanks and pipework. Regular use helps keep your water system free from micro-organisms to provide fresh drinking water in your caravan kitchen and bathroom. Perfect for using in caravans and motorhomes after storage or overwintering! Comes in an excellent value, easy to pour from 5 litre bottle. Sanitises, descales & removes algae and bacteria. Helps to prevent stale taste and odours!