UltraClear Flocculant is a chemical formulation that clears pond water by causing tiny particles to clump together (flocculation). Through flocculation, pond particles become large enough to settle by gravity to the bottom of the pond (where they can be vacuumed away) or easily filtered. Flocculant also removes phosphates from pond water. UltraClear Flocculant works in just hours, compared to UltraClear Biological Pond Clarifier, which will take days to weeks to show a satisfactory result. However, any chemical clarifier, including UltraClear Flocculant, will remove beneficial bacteria along with other pond particles. Therefore, we recommend application of UltraClear Biological Pond Clarifier after use of any chemical clarifier. Use 2 ounces of Flocculant for every 1,000 gallons of pond volume (or about 1 teaspoon for every 100 gallons of pond volume).