Check the listing for details. Ultra Clear Clarifier 12 oz. Condition: New. Listed at 19.50 USD. ULTRACLEAR BIOLOGICAL POND CLARIFIERPoor clarity, aquatic weeds, organic sediment, and foul odors detract from a pond's natural beauty. Fertilizer run-off, fish and wildlife droppings, and dead leaves and grass clippings contribute to these problems. UltraClear Biological Pond Clarifier improves clarity, cleans the water, reduces organic build-up, and removes odors. UltraClear Biological Pond Clarifier restores aquatic systems to natural health and beauty.UltraClear is the environmentally friendly way to beautify your ponds and fountains. UltraClear works naturally and actually benefits the environment. UltraClear Biological Pond Clarifier is 100% safe for fish, wildlife, and turf. UltraClear Biological Pond clarifier will not harm fish or other wildlife that are in your pond or use your pond. And, UltraClear Biological Pond Clarifier is easy to use. Simply shake well and pour straight from the bottle according to the dosage instructions.WHAT ARE THE MAIN APPLICATIONS OF BIOLOGICAL POND CLARIFIER?There are three main applications:Spring PrepGeneral Pond MaintenanceTreating Problem PondsDuring Spring Prep (pond start-up), the main objective is to rapidly establish a healthy population of bacteria to 'cycle' the pond. Fish excrete ammonia, which can be toxic at very low levels. When bacteria cycle, it means they successfully oxidize ammonia (NH3) to nitrite (NO2), then to relatively non-toxic nitrate (NO3). Other bacteria can then convert nitrate into nitrogen gas in a process called denitrification. Use of Biological Pond Clarifier for Spring Prep prevents build-up of toxic ammonia and nitrite, making your pond a healthy place for fish.As the summer proceeds, Biological Pond Clarifier serves its main function: maintaining your pond's beauty and clarity. This is probably the most common and important use of the product. Following the Maintenance program will prevent most common pond problems from occurring.Finally, Biological Pond Clarifier can be used to solve most pond problems. Even when a problem already exists (poor clarity, odors, etc.) regular strength Biological Pond Clarifier will usual solve the problem.