Got phosphate problem! Try PhosBan by Julian Sprung’s Formula of ferric oxide hydroxide granules. PhosBan binds large quantities of phosphate, nearly 3x more capacity by weight than wet ferric hydroxide adsorbants. And it is completely reef safe, unlike alumina-based adsorbants. PhosBan also adsorbs organic compounds and other pollutants, and doesn’t release anything back into the water, even when fully saturated. PhosBan gives long-lasting control of phosphate levels for a clean aquarium and enhanced growth of hard and soft corals. PhosBan Phosphate Adsorption Media. Problem solved.

150 grams will treat up to a 150 gallon tank for several months (depending on the phosphate level). Replace when phosphate levels start to rise. Media bag included.