AquaMaxx BioMaxx Plus BioPellets Filter Media - 8fl oz BioMaxx Plus BioPellets initiate a more efficient denitrification process that removes nitrate and phosphate from aquarium water. Use 0.5 to 1 liter of pellets for every 125 gallons of water. Using BioMaxx Plus BioPellets inside a fluidized filter (media reactor) will help to achieve maximum results and efficiency.