- Bacteriological enzymatic water soluble dose that provides bio - purification of organic waste to prevent blocked pipes and emanation of unpleasant smells. - Dissolve the doses in a bucket of warm water. Wait 10 to 15 minutes for the enzyme extracts to reactivate. Pour the dilution into the area to be treated. Begin by seeding with 3 doses for a tank of 100 to 150 litres. Then, maintain by adding one dose per week in the lavatory bowl.