Biopellets are proven to keep low nitrates and phosphates in Marine and Reef Aquariums. Kolar is the exclusive manufacturer and distributor of Pure Metabolix DP9002 PHA. This was the original resin developed specifically for the aquarium market to maintain low nitrates and phosphates. PHA is fully bio-degradable and releases carbon to promote the growth of nitrogen fixing bacteria. Kolar and Metabolix have done extensive research and testing on the material to insure uniformity of the pellet and efficacy of the nitrogen fixing cycle enhancement.