Dr. Tim's Clear-Up H2O (Freshwater)Clear UP clears cloudy white water. Clear UP is a 100% natural water clarifier consisting of beneficial bacteria, with the ability to "floc" small particles from the aquarium water. The result is clear water without the use of the harmful chemicals contained in other water clarifiers, such as alum (that contains aluminum) and polyacrylamide (a potentially toxic chemical). Directions: Shake well before using. Dosage: Add 5 ml per 10 gallons of aquarium