Brightwell Aquatics Phosphat-E - 250ml Brightwell Aquatics Phosphat-E - 250ml is a liquid phosphate remover for marine fish and reef aquariums. It begins eliminating reactive phosphate immediately after dosing and is intended to help reduce or maintain phosphate in heavily stocked or nutrient-rich saltwater systems. Brightwell Phosphat-E Liquid Phosphate Remover for Marine Aquariums Phosphat-E binds reactive phosphate into an inert particulate that can be removed through mechanical filtration and protein skimming. It is useful when phosphate needs to be lowered more directly than with passive media, especially during periods when dissolved organic material and nutrient input are elevated. Phosphat-E 250ml Reef Phosphate Control Features Begins eliminating reactive phosphate immediately after addition. Suitable for marine fish-only and reef aquariums when used as directed. Each 1 ml eliminates 1 ppm phosphate in 4 US gallons of water. Helps control phosphate in heavily stocked aquariums. Can be used on an ongoing basis to help maintain low reactive phosphate. Over 50% stronger than many competing phosphate-removal products. Brightwell Phosphat-E Filtration and Testing Notes Size: 250 ml bottle. Use: Marine fish and reef aquariums. Product type: Liquid reactive phosphate remover. 250 ml treats up to 1,000 US gallons at the overview strength rate. Temporary cloudiness may occur after dosing and should dissipate. Phosphate test kits may show false-positive readings after treatment until bound phosphate is removed by filtration. Ingredients: Purified water and proprietary phosphate removers. Phosphat-E Dosing Directions for Saltwater Tanks Test phosphate with an accurate test kit before use. Add Phosphat-E near the intake of a mechanical filter or protein skimmer so the inert particulate can be removed efficiently. Brightwell's basic technical guidance is 2.5 ml per 20 US gallons daily to remove 0.5 ppm phosphate. Do not exceed 0.5 ml per 4 US gallons daily. If corals or other invertebrates react negatively, phosphate may be dropping too quickly; reduce the dose by 50% and continue treatment more gradually. Avoid sudden phosphate reduction in systems that have been elevated for several weeks. What's Included One 250 ml bottle of Brightwell Aquatics Phosphat-E.