Cyano Bacteria (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 disease causing Red Cyano Bacteria from live coral, 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 algaes, nitrifying bacteria, and fish. Contains no phosphates, algacides, or erythromycin succinate. This package treats 300 gallons. Use as directed.