Dr. Tim's Aquatics Phos-EliminatorPhos ELIMINATOR quickly removes phosphate and silicate from marine and freshwater aquaria. Reef Safe. It should not be used with phosphate based buffers. Use 1 3 cup (85 ml) of Phos ELIMINATOR for every 50 gallons saltwater or 100 gallons freshwater. Product should be rinsed with freshwater before use. CAUTION product may generate heat and fizzle upon initial contact with water handle carefully. Place into a filter bag and put filter bag in area of