For RV and Marine gray/black water holding tanks Liquifies bio solid contents in toilet waste tank. Easier disposal of liquified bio-waste Reduces gas build-up Prevents odors during/after dumping Not harmful for septic environment No harmful chemicals Mix 1 scoop of Camper Chem Organic Holding Tank Treatment with 1 gallon of clean water, and stir until it is completely dissolved. Pour the resulting solution to the application area (Bath tub, sink or toilet bowl). Pour additional 2 gallons of water on top and let it drain. If the holding tank capacity is more than 40 Gallons or the ambient temperature is hotter than 100F, increase the dosages proportionally. Never use more than 1 scoop with 1 gallon of water, to avoid solidification. Mix 1 scoop of Camper Chem Organic Holding Tank Treatment with 1 gallon of clean water, and stir until it is completely dissolved. Pour the resulting solution to the application area (Bath tub, sink or toilet bowl). Pour additional 2 gallons of water on top and let it drain. If the holding tank capacity is more than 40 Gallons or the ambient temperature is hotter than 100F, increase the dosages proportionally. Never use more than 1 scoop with 1 gallon of water, to avoid solidification.