Features Reduces nitrate and phosphate Carbon-based biopolymer (PHA) For use in a fluidized bed reactor Overview biogen™ is a carbon-based biopolymer (PHA) designed to reduce nitrate and phosphate. In a fluidized bed reactor, it will support the growth of bacteria that consume nitrate and phosphate over 10% more efficiently than the leading competitor. Reducing phosphate and nitrate can enhance coral coloration and reduce nuisance coatings of rock and decorations.