• 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-gallons).
• Helps facilitate the removal of phosphate from aquaria during periods when dissolved organic material is abundant.
• May be used on an ongoing basis to help control phosphate in heavily-stocked aquaria.
• Over 50% stronger than most competing products.
• Formulated by a marine scientist.
By now at http://www.bigbluepets.com/brightwell-aquatics-phosphat-e-liquid-17oz.html