Dry formula performs just like the liquid. Great for short, weekend trips or for use in pop-up campers where storage space is limited. Just 4oz. 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.