Thetford Aqua Kem Blue is a powerful and easy to use toilet fluid for the waste holding tank, which offers the best performance for your Cassette or portable toilet. Combined with Thetford Aqua Rinse and Aqua Soft, it\'s ideal for daily use in your mobile toilet. How to use: 1 - Dose 120 ml per 20L waste-holding tank capacity 2 - Add 3L of water to ensure optimal performance of the toiletSuppresses unpleasant smells Reduces gas build-up Stimulates the breakdown of solids and toilet paper, which results in easier emptying Keeps the waste-holding tank pure and clean Protects moving parts & extends the lifespan of the toilet Lasts 4-5 days with average use