Camco TST Blue Ultra-Concentrated Enzyme Drop-Ins for RV Toilets Review 2026: Is it Worth It?

Enzyme complex formulation that digests waste, tissue, fats and proteins — real-world benefit: reduces buildup inside black tanks so fewer manual cleanings are needed.

Ultra-concentrated single-drop dosing — one Drop-IN is designed to treat up to 40 gallons and provide odor control for about 7 days under normal use.

Drop-in solid delivery for simple dosing — no measuring or pouring, which lowers spill risk and simplifies use during travel.

Biodegradable and septic-safe ingredients — safe for septic systems and dump stations and avoids formaldehyde-based chemicals.

Clean / mild fragrance option — masks odors without overpowering campers; suitable for users sensitive to strong perfumes.

Made in the USA and sold in multi-packs — consistent supply and packaging quality, useful for multi-week trips.

Works reliably for routine occupancy — users report steady odor control during regular weekly facility use.

Minimal equipment interaction — designed not to harm tank sensors or seals when used as directed.

Inconsistent performance in long-idle tanks — multiple reviewers needed to double dose after multi-week storage or heavy accumulation.

Reduced enzyme activity in cold conditions — effectiveness drops in low temperatures, requiring increased frequency or extra tablets.

Not a one-size-fits-all for severe odor problems — heavy use, septic issues, or high solid loads may require stronger or complementary treatments.

Per-use cost can be higher than bulk liquids for large tanks — solid convenience can trade off against raw cost-per-gallon treated for some users.

Some users report variable results over long seasons — occasional need to switch or supplement with alternative products for persistent issues.