Walex Bio-Active Holding Tank Treatment - Enzyme-Based Deodorizer with Commercial-Grade Digestive Power, Liquefies Waste & Tissue, Cleans Sensors, Prevents Clogs & Odors, Formaldehyde Free, 168 oz

I have 2 bathrooms in my RV. Not 2 thanks, 1 only. My half bath toilet had an order. My bathroom has a maserator and the sensor was clogged, we'd get a red light and stop working a few days after dumping.We tried this with hot water after dumping and driving to our next stop. We got a green light. We put 5 gallons of hot water between the 2 toilets.The clog came back, so we did the hot water and chemicals the next few times we drove, no more people's.

We have had 3 trailers and have been camping for 20 years. We use this and we have never had an odor problem. Great product.

We have a 5 gallon toilet in our camper, and this stuff did NOT do the job.We usually use the typical pods you see on here. We ran out and decided to give this product a try as it was priced more affordably. We are a family of five in a 17ft Vintage Camper, so this is pretty important for us. The liquid is not as convenient, and clearly not as strong.It under performed. We will be going back to the pods.

Highly recommend this product! Doesn’t have fake perfumes that make your RV smell, yet it keeps the black tank smell out! If you hate those fake smelling tank treatments, I suggest you give this one a try!

Deffinatly kills odor.. not the cheapest but works

Great product and good value. Our camper is on a seasonal site and this product really helps with the bathroom commode smell. We have tried alot of them and this one works the best.

Works great.

I've used this for some time now. Like all enzyme black tank cleaners it works well; breaks down solid waste and tissue paper given enough time. I put 4 oz's plus two gallons of water in the tank when in storage or after emptying the tank. I have not sensed any objectional smells coming out of the toilet.

Black water tank

I use it at my trailer and even at home. My bathtub 🛀 was clogged. I used vinegar and baking soda and snaked it to no avail. I poured about 1/4 bottle down the tub and the next day when I showered, the water went right down. Awesome.

Packaging was damaged but jug was ok so far no leaks from jug

Very effective, low odor. Keeps my holding tank as clean as it has ever been!

Tried almost everything out there. This seems to do the trick even when the black tank needs to be emptied. Never a foul smell to be found.Great product