To remove sludge, leaves, debris and odors, Bio-Max dry formula contains several billion bacteria per gram and six added enzymes. Potent bacterial strains, grown on Activated Barley in a patented process, clean and clear ponds, improve dissolved oxygen and lower nitrate levels that might otherwise feed rampant algae growth. Use along with Bio-Max+ in a weekly maintenance program to keep sludge at bay and water quality at its peak.