10 Best Rv Holding Tank Cleaner 2026 in the United States

The Camco TST PRO RV Toilet Treatment Drop-INs are a convenient and effective option for keeping your RV's black and grey water tanks clean and odor-free. These capsules use a bio-enzymatic formula that contains natural enzymes and bacteria to quickly break down waste, toilet paper, grease, and food debris. This helps reduce clogs and keeps the tank sensors working properly. One notable strength is the fresh pine scent that masks unpleasant odors without being overpowering. The product is septic-safe and biodegradable, making it friendly for both your RV system and the environment. It’s designed to work well even in higher temperatures, though you might need to apply it more often if it's very hot.

Since these are drop-in capsules, they are very easy to use—no messy pouring or measuring needed. Camco also ensures compatibility with common tank materials like plastic, so you can use it without worry. Some users mention needing regular applications for best results, and it’s important to store the capsules below 110°F to maintain their effectiveness. The TST PRO Drop-INs are well suited for RV owners seeking a simple, no-fuss solution to maintain both black and grey tanks with good odor control and efficient waste breakdown.

The Unique RV Digest-It Ultra is a bio-enzymatic liquid cleaner designed specifically for RV black and gray holding tanks. It uses natural bacteria and enzymes to break down waste and toilet paper efficiently, which helps prevent clogs and buildup that can cause sensor problems. One of its main strengths is its super concentrated formula, which provides 32 uses per 32-ounce bottle, offering good value without needing frequent repurchases. It also helps keep odors under control with a pleasant scent, which is important for improving the overall RV bathroom experience.

The treatment is safe for various tank materials, including plastic, rubber, and metal components, making it compatible with most RV systems. Its liquid form and easy measuring bottle make it simpler to dose correctly compared to drop-in tablets, supporting regular maintenance and smoother tank emptying. An added benefit is the included access to a certified RV tech support team, which can be helpful if you encounter any issues.

On the downside, while it is highly effective at waste digestion and odor control, users need to remember to dose it regularly for best results. Also, although it is scented, some may prefer an unscented option depending on personal preference. This product is a reliable choice for RV owners looking for a preventive, easy-to-use treatment that keeps tanks clean and odors low.

The Camco TST MAX RV Toilet Treatment Drop-INs offer a convenient, chemical-based solution specifically designed to control odors and break down waste in RV holding tanks. These drop-in tablets use reactive odor-eliminating technology that effectively controls unpleasant smells for up to 7 days, which is ideal for those seeking a low-maintenance option. They are formaldehyde-free and biodegradable, making them safe for septic systems and less harsh on the environment, a significant benefit for eco-conscious users.

This product breaks down waste and toilet paper to help prevent clogs and improve sensor accuracy, and it works well with common RV tank materials without causing damage. Usage is simple—just drop one tablet into the toilet for tanks up to 40 gallons, making it suitable for both occasional campers and full-timers. The tablets feature an orange scent that adds a refreshing touch without being overpowering.

A consideration is that dosing is fixed per tablet, which may not be ideal for smaller or much larger tanks without adjustment. Additionally, these tablets are primarily intended for black water tanks and toilets, so they may not be suitable for gray water or other cleaning needs. Camco TST MAX provides a reliable, easy-to-use choice for RVers who want strong odor control and effective waste breakdown with environmentally friendly ingredients, especially if preferring drop-in tablets over liquid treatments.