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. Fritz Zyme MONSTER 360 has been specially formulated to handle the organic waste produced by monster fish Super concentratedPromotes a clean, clear and healthy aquariumReduces and simplifies maintenanceEliminates foul odors and improves water clarityBacteria rapidly digest waste 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 the aquarium in an area of high flow to allow the product to circulate. Turn off UV sterilizers for 48 hours after application. NOTE: An earthy odor is normal, a natural result of biological activity. The odor will quickly dissipate when adding products to the aquarium. Color variation is normal.