Description Water-soluble sachets for waste-holding tank of potable or built-in cassette toilets.The waste CANNOT be emptied into septic tanks, see GREEN for a biological alternative.. Easy to use: sachets completely dissolve in water Apply the right dose easily Highly concentrated Suppresses unpleasant smells Reduces gas build-up Keeps the waste-holding tank clean Stimulates the breakdown of solids and toilet paper, which results in easier emptying Lasts an average of 4 to 5 days 12 doses of 55g each Use 1 dose per 20 litres of holding tank capacity Add 3 litres of water to ensure optimum performance