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Enviro-Culture Rv & Marine FAQ'sFAQ 1. How does it work? The little decomposition occurring in your 2. How often do I use it? Enviro-Culture© Tank Treatment should be applied to waste holding tank (black or gray) prior to use for best results. Product should be reapplied each time after dumping while tank is in use. *If odors persist, confirm that there are no chemicals present and reapply. 3. How do I apply it? 2oz Package: Black Water Tanks: Empty package into toilet and flush. Gray Water Tanks: Empty package into sink or shower drain and flush with water. 8oz Package: Black Water Tanks: Apply 3 scoops into toilet and flush. Gray Water Tanks: Apply 3 scoops into sink or shower drain and flush with water. |