Thetford Eco Smart RV Holding Tank Deodorant - Waste Digester - Detergent - 4 x 4 oz pack 36974 [VERSATILITY]: Eco Smart is a powerful RV and marine waste holding tank deodorant that will work year-round to eliminate odors [PERFORMANCE]: Strong formula, breaks down and liquefies waste and tissue, ensuring a no clogging experience [CONVENIENCE]: Eco Smart comes in 4-4 oz bottles, making measuring and pouring an easy task [SAFETY]: Made from biodegradable ingredients, Eco Smart is a formaldehyde-free liquid in a child-resistant bottle [FUNCTIONALITY]: The 3-in-1 formula contains a powerful waste liquefier for breaking down waste, a deodorant for eliminating bad odors, and a detergent for cleaning the tank walls and the drain lines