Ultra Clear Flocculent. A fast acting highly concentrated chemical liquid product that produces and maintains crystal clear water. Works in 12 to 24 hours. Safe for fish and plants. Compatible with our Ultraclear biological products. Will force silt, algae, etc. to clump together and can be filtered or settled to the bottom of the pool. Use 2 ounces for every 1000 gallons of pond water or for smaller ponds use 1 teaspoon for 100 gallons of water.