Aquarium Pharmaceuticals Phos-Zorb 5.25oz

Phos-Zorb is a special filtration material that selectively removes phosphate and silicate, common nutrients found in fresh and saltwater aquariums. In saltwater aquariums, excess phosphate lowers the available calcium and magnesium necessary for the growth of hard corals and other invertebrates. •Removes phosphate and silicate •Removes phosphate, a by-product of fish metabolism and decaying organic matter and an additive in some tap water supplies, aquarium products and filtration media •Will not remove trace elements •Will not affect pH •Treats up to 55 Gallons