Our biopellets are manafactured from pure Polyhydroxyalkanoates (PHA), from a strain of bacteria specifically for use in aquaria systems. Biopellets are a popular method of reducing phosphate and nitrate levels in your aquarium. The pellets provide a food source for bacteria that also consume nitrate and phosphate. As your tank water passes through the biopellet reactor, bacteria get flushed off the pellets and enter the aquarium's water column, where they consume nitrates. Then the bacteria is removed through several methods, including protein skimmer, and consumption by tank inhabitants. The bacteria may also convert the nitrate to nitrogen gas. Starting dosage is approximately 300mL per 75 gallons of aquarium water. Place pellets in a suitable media reactor and adjust flow to keep them tumbling gently.