New! Thetford Storage Deodorant Controls odors in stored RV holding tanks and tote tanks for up to six months! It's compatible with antifreeze, is non-formaldehyde and 100% biodegradable. The quality and reliability you expect from the makers of Aqua-Kem. Available in: 24 oz. liquid: SKU 32901 3-pack of 8-oz. bottles, SKU 32900