ATM Aquarium Products Outbreak Freshwater Aquarium Cleaner CLEANING BACTERIA: Bacteria digests organics and sludge around the clock INDUSTRIAL STRENGTH: Specially selected strains used for even intense industrial organic waste NON-TOXIC:All natural bacteria are non-pathogenic and non-toxic. REMOVES ODORS: Bacteria do not create hydrogen sulfide as byproduct, making it clean and efficient. EASY: Weekly maintenance system Biological Bacteria Blend Keeps Tanks Clean and Odor Free Removes Sludge and All Organic Buildup Ensures A Clean and Healthy Bio filter