FritzZyme® MONSTER 460 is a powerful, concentrated probiotic blend of naturally-occurring, environmentally-friendly, live saltwater-specific heterotrophic bacteria capable of digesting organic sludge common in aquariums. FritzZyme® MONSTER 460 has been specially formulated to handle the organic waste produced by “monster” fish, including puffers, sharks, rays, grouper, eels, lionfish, angelfish, etc., as well as heavily-stocked tanks. Sludge includes fish waste, leftover food and other decaying organic matter. Using FritzZyme® MONSTER 460 as part of a regular maintenance program, along with gravel vacuuming and water changes, will greatly reduce aquarium care and prolong filter media life. The bacteria in FritzZyme® MONSTER 460 is safe, non-toxic and non-pathogenic. Directions & Dosage Initial dose, use 1 tsp (5 ml) per 25 US gallons (95 L). Maintenance dosing, 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.