Best RV Sewer Chemicals & Cleaners of 2025

“I find these pods super easy to use! Just toss them in the toilet, flush, and they keep my black tank clean and odor-free. In the hot summer months, I recommend using two packs.”

“I’ve been using two pods in the black tank and one in the sink to prevent odors. They work great, but I've noticed that if I leave the container in the trailer for a season, the pods can start to melt. I take a few at a time on trips and keep the rest in a cooler at home.”

“Living in Florida, I add one of these pods to my camper toilet after dumping waste, and there’s never a smell issue. I did have a little inconvenience last spring when I found the pods had popped open, leaving just powder and skins, but they still work fine, just a bit of a hassle.”

"After switching to Unique RV Digest-It, I never worry about my RV's black tank. It effectively dissolves waste and keeps everything functioning smoothly, with no unpleasant odors even after months of parking."

"I was impressed by the performance of Unique RV Digest-It in my experiment—it completely liquified the dog kibble, while the other product left solid chunks. The odor was also pleasant, unlike the competition. I’ll be using it in my gray water tank for sure!"

"This product is a lifesaver! I had a significant clog in my RV, and after following the instructions and letting it sit, it cleared the blockage and eliminated the odor. Best investment I’ve made for my RV!"

"I found this product at a great price, and I really appreciate the larger bottle size. I've tried numerous gray tank odor controls before, and to my surprise, this one actually works. I used the 8oz as recommended for my 40-gallon tank, and it handled my 75-gallon gray tank just fine. Definitely worth trying!"

"Our camper's grey tank had a persistent odor, even after I flushed it after each trip. I initially poured it down the kitchen sink, and it helped a bit, but the smell remained. After also using it in the bathroom and shower drains, I was thrilled that the smell completely disappeared. I highly recommend this product!"

"Living the RV life means I’m always on the lookout for products that both clean and sanitize while keeping the tanks smelling fresh. This product has a refreshing scent that lasts a few days, which is fantastic. However, it didn’t help with the tank flies I encountered after forgetting to close the line. I had to use a stronger solution for that, but overall, if you remember to close the pipes, this product does its job well!"

"I've been using this cleaner for my camper, and it really cuts the smell while helping to dissolve the paper. I drop a pod in after every tank emptying and add water. It works wonderfully, and the lavender scent is a nice change from previous products."

"After trying various brands for RV black tank cleaning, I can confidently say this one is the best. It has a fresh smell and keeps my tank odor-free. I simply drop in a tablet, and it does all the hard work."

"This product smells amazing and works exactly as promised. With 30 years of RV experience, including 5 years full-time, I can say this is my new favorite holding tank chemical. Give it a shot!"

"I bought this product to keep the smell down for our Hipcamp Porta John, and it works great. I really like the size, ease of use, and the pleasant scent it leaves. It’s a great addition to our camping setup!"

"I’ve tried many products, but this one is the best for my 5th wheel. It keeps the odor at bay for about a week, even in the heat. My only concern is that the price keeps going up, which is frustrating!"

"This stuff is a lifesaver for my RV and home. For the RV, it eliminates smells in both tanks with just a little amount. At home, it clears slow drains without harming my pipes. I’ve even recommended it to several friends!"

"After using the Liquified RV Toilet Treatment, I’m thoroughly impressed. It has completely transformed my black tank maintenance routine. The treatment breaks down buildup effectively, and I’ve noticed a significant reduction in clogs. Plus, the refreshing citrus scent masks unpleasant odors, making my RV feel inviting!"

"I have tried various RV toilet treatments, but Liquified is a game-changer. The super concentrated formula means I only need a small amount, which lasts a long time. It breaks down waste and prevents clogs beautifully, and the pleasant scent keeps odors at bay even during extended trips!"

"I decided to try Liquified after seeing a demo on YouTube, and it truly works wonders. The smell is reduced significantly, and it cleaned my tank out effectively with an additional flush. It's great stuff, but I have had a hard time finding it locally in Canada."

"This is an excellent product for our RV black tank toilet. I use the recommended amount, it's economic, and I will be buying again—THANKS!"

"I've been using the RV Black Tank Treatment on my floating bar's restroom holding tank, and it does a great job at keeping odors under control and breaking down waste effectively. With 16 treatments in each bottle, it's a convenient solution for long-lasting use. Each dose goes a long way, and I've noticed a significant reduction in unpleasant smells, even in our high-traffic setting. The formula is easy to use—just add the recommended amount to the tank. A minor drawback is the strong scent right out of the bottle, but that fades once it's added to the tank. Overall, it's a dependable choice for anyone needing a waste treatment that can stand up to frequent use and tough conditions."

"After I de-winterized my motorhome and added fresh water, I also added this black tank digester. Two days later, I smelled sewer, which made me think I had a leak in my black tank. However, I realized the digestive liquid was doing its job. After I filled up the black tank and flushed it, I added more chemical with 5 gallons of water for our two-week trip. I know it cleansed the black tank because my sensors all worked."

"I recently started using the Unique RV Digest-It Black Water Tank Treatment and it has proven to be an excellent choice for managing my RV's black water tank. These concentrated drop-in pods are not only effective but also incredibly convenient. The performance is outstanding, breaking down waste and controlling odors, which has made a noticeable difference in my RV's comfort."

"After three years of using another product, I switched to this one while traveling from Florida to Alaska. During hot weather, I would drop a pod in and fill the toilet, and I never smelled anything bad! I’m so glad I tried this; it has become a necessity on my trip."

"I've found that this product works better than most for breaking down waste, but not so great for controlling odor. I use this along with a lavender scent product to tackle both issues. Despite this, I've had no problems with our black tank sensors after 5+ years of use."

"After 15 years of RV-ing, I can confidently say this is the best product I've used. It completely eliminates all odors without any dyes or strong perfumes. Just a white, odorless powder that doesn't leak. My only issue is that it congeals in the bowl, so I add a square of toilet paper first."

"In my experience, using Happy Campers has been a game changer for cleaning the black tank. After dumping, I mix Dawn dish soap and Calgon water softener with water, then add the product. It keeps my tank slick and odor-free, even in extreme temperatures. I highly recommend this simple method!"

"I've tried many black tank treatments, but this one is definitely the best! Since switching, there have been no odors in our camper. Following the instructions on the container is key to achieving great results!"

"If you're considering a tank treatment, Unique is the only product I use! I've tried other brands, but this one is the only one that works. Best stuff ever, and the company is awesome!"

"As a full-time RVer with a family of four, I make sure to maintain my black tank. After using this product just once, my flush came through crystal clear, and it eliminated odors better than anything else I've tried. I’ll definitely recommend it to other RVers!"

"I was skeptical about the effectiveness of Unique Clean-It, but after using it, I was pleasantly surprised. After five days, only one LED on the sensor lit up, showing that it worked. I'm very pleased with the results!"