Phosphat-E 250mlOverview Begins to eliminate reactive phosphate immediately upon addition to aquarium. Safe for all inhabitants of reef and marine fish only aquaria. Each ml eliminates 1 ppm phosphate in 4 US gallons of water (250 ml treats 1,000 US gal). Helps facilitate the removal of phosphate from aquaria during periods when dissolvedorganic material is abundant. May be used on an ongoing basis to help control phosphate in heavily stocked aquaria. Over 50%