Keep your black tank odor-free and your sensors reading accurately. Camco TST Fresh Scent drop-ins use a calcium nitrate formula that generates oxygen inside your holding tank, feeding the good bacteria that break down waste and tissue while eliminating the odor-causing bad bacteria. No formaldehyde, no harsh chemical smell -- just a clean, fresh-scented tank ready for your next trip.
Most RV owners have dealt with the two chronic frustrations of holding tank maintenance: stubborn odors and tank sensors that read full when the tank is half empty. Camco TST Fresh Scent drop-ins address both problems in a single product. The calcium nitrate chemistry releases oxygen into the tank, which activates aerobic bacteria to digest solid waste and toilet tissue quickly, keeping sludge from building up on your sensor probes and causing false readings.
Each 4 oz water-soluble packet is pre-measured for a 40-gallon holding tank. Drop one in, add a small amount of water, and let the formula do the work. There is no measuring, no pouring, and no accidental overuse. The 15-pack gives you a full season of treatments and enough on hand to adjust dosing for larger tanks or summer heat.
Generates oxygen to support aerobic bacteria that digest waste and tissue rapidly, reducing clogs and solid buildup at the tank bottom.
Breaks down the biofilm and waste coating that sticks to probe-style tank sensors, restoring more accurate level readings over time.
Each water-soluble 4 oz packet treats one 40-gallon tank for up to 7 days -- no measuring cup, no spills, no guesswork.
Safe for septic systems, dump stations, and the environment. Contains no formaldehyde and is 100% biodegradable.
Correct dosing keeps treatment effective without waste. Follow these guidelines based on your setup:
Many budget tank treatments rely on masking dyes and perfumes that cover odors without addressing their cause. TST's calcium nitrate formula takes an oxygen-based approach -- it changes the chemistry of the tank environment so odor-causing anaerobic bacteria cannot thrive. You get genuine odor elimination rather than a temporary fragrance mask.
The fresh scent in this formulation is mild and clean, not the sharp chemical smell associated with older formaldehyde-based products. It is a meaningful difference if you are camping with family or using your RV in warmer weather when tank odors can migrate more easily.
Unopened TST drop-ins have a shelf life of 4-5 years, giving you flexibility to buy in quantity. Once the bag is opened, shelf life is 2-3 years when stored properly. Keep the packets in a cool, dry location away from direct sunlight.