Thetford  15842 RV Trailer Camper Sanitation Gray Water Odor Control (1) Waste Holding Tank Treatment; Holding Tank Treatment; Biological Treatment Used To Eliminate And Prevent Offensive Odors In Drains/ Vents And Traps Of Sinks/ Showers And Grey Water Holding Tanks; Without Formaldehyde; With Deodorant; Without Lubricant; 24 Ounce Bottle; Single Dissolves Cooking Grease And Cleaning Residues Prevents Grease Build-Up In Grey Water Holding Tank No Chlorine Or Solvents To Damage Valve Seals 100 Percent Biodegradable Liquid