FritzZyme® MONSTER 360 is a powerful, concentrated probiotic blend of naturally occurring, environmentally friendly, live heterotrophic bacteria capable of digesting organic sludge common in aquariums. FritzZyme® MONSTER 360 has been specially formulated to handle the organic waste produced by “monster” fish, including oscars, arowana, freshwater stingrays, piranha, peacock bass, arapaima, gar, etc., as well as heavily-stocked tanks (African cichlids). Sludge includes fish waste, leftover food and other decaying organic matter. Using FritzZyme® MONSTER 360 as part of a regular maintenance program will greatly reduce aquarium care including gravel vacuuming and water changes, as well as prolonging filter media life. The bacteria in FritzZyme® MONSTER 360 is safe, non-toxic and non-pathogenic. Directions & Dosage Initial dose: Use 1 tsp (5 ml) per 25 US gallons (95 L). Maintenance dose: Use 1 tsp (5 ml) per 50 gallons (190 L). Shake well, add directly to aquarium in an area of high flow to allow product to circulate. Turn off UV sterilizers for 48 hours after application. NOTE: An earthy odor is normal, a natural result of biological activity. Odor will quickly dissipate when adding product to aquarium. Color variation is normal.