Aqua clear - water clarifier: clears the haziness of freshwater aquariums and fish ponds. Makes the water crystal clear. Prevents the algae growth and water from smelling bad. Active inorganic molecules in the ingredients bond with the organic molecules in the water and make them either sink to the bottom of the aquarium or make them collected in the filters. Add between 1 and 5 ml for every 100 liters. A white cloud could form first but clarity will occur in a short time. It could take 8 hours to affect completely. Use once a week when there is a smell and haziness in the water. 125 ml is enough for 2,500 liters. Don't overdose. It could make the water hazy. In this case, make a water change.