Cyanobacteria (Red Slime) is a hybrid algae-bacteria that thrive in aquarium waters rich in waste products and dissolved organic matter. It can be very difficult to eliminate this unwanted guest once it has begun to spread. Boyd Chemiclean Aquarium Treatment is a triple-threat treatment for this unattractive pest. Chemiclean removes stains from red, black, blue-green, and methane (bubble) producing cyanobacteria in marine aquariums, oxidizes trapped organic sludge and sediment, and clarifies aquarium water while promoting an ideal enzyme balance. This product is safe for reef tanks, all invertebrates, desirable macro algae, nitrifying bacteria, and fish. Contains no phosphates, algaecides, or erythromycin succinate. This package treats 900 gallons. Use as directed.