Get the same odor eliminating treatment for your RV's holding tank in a convenient 4 oz liquid pack. Just 4 oz. does it all: eliminates holding tank odors completely, breaks down waste and tissue, lubricates valves, and prevents clogging. Clear, non-staining formula is safe for chemically sensitive people. 100% biodegradable. Contains no formaldehyde and is safe for any septic tank system. Priced each.