Microbe-Lift TheraP for AquariumsProvides a natural aquarium ecosystem, for better overall fish health and improved water quality For SALT & FRESH WATER. Reef Safe. Saltwater environments the bacteria in this product will remain effective when used in marine environments with a specific gravity of 1. 017 to 1. 025. In new marine tanks, add the aquarium salt mix and allow the water to circulate for 24 hours, then check and adjust the density. Add the bacteria after the water has