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This Walex holding tank treatment uses a bio-active formula to go after odor at the source instead of just masking it. The liquid digests waste and toilet paper in your black tank, which helps keep sensor strips reading accurately and cuts down on the buildup that leads to clogs and residue over time.
At 68 ounces, one bottle stretches across many dump-and-refill cycles, so you're not restocking every trip. It's an unscented formula, which is a good pick if you'd rather not mix it with a separate air freshener or if strong perfumed treatments bother you.
Follow the dosing directions on the label based on your tank size and how long the rig will sit before its next dump.
