AquaMaxx BioMaxx Plus BioPellets Filter Media - 16fl oz BioMaxx Plus BioPellets initiate a more efficient denitrification process that removes nitrate and phosphate from aquarium water Using BioMaxx Plus BioPellets inside a fluidized filter (media reactor) will help to achieve maximum results and efficiency. Use 0.5 to 1 liter of pellets for every 125 gallons of water.