Zaal NoFlex Digestor Boat and RV Sewage Treatment | Liquifies and Removes Sludge, BuildUps, Neutralizes Bad Odors, Eliminates Waste | No Harsh Chemicals, Leaves Septic Tank Clean, Healthy and Odorless

Works as advertised. No issues or odors after year one.

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The best ever stuff to deodorize your black water tank, and gray water as well.

This product was recommended to me by the owner of a company who cleans RV black tanks. It's a bit pricey, but works better than the regular store-bought pods and digesters. Seems to reduce the smell quite & break down waste after a couple of days of treatment. I add it regularly per the directions. My black tank is happy.

I am using this on a houseboat as the head was rather smelly when I bought it. Odor absorbent gels in the bathroom, Febreze standing by, it wasn't awful but it was enough that I wasn't ok with the smell. My realtor recommended this stuff and it worked really well. It's expensive but it works, you just have to remember to add the additional scoop every other day or so. I keep looking for other treatments that might be cheaper but I hesitate as I *know* this one works. Update March 2021: I use this product almost exclusively. However I can get it for 15 dollars a bottle cheaper at a local store. I couldn't live here without this stuff, but I'm paying 20 a piece vs 33 dollars at the time of this update. I say it's worth it's weight in gold, but I didn't mean that literally. Edit: I got the black water tank flushed out and the smell is totally gone. I am using this as directed to help keep it that way. Update Jan 2024 -- I've moved out of the boat and I used this the whole five years. I am even leaving some behind for the new owner so they don't deal with the issues I did when I first moved in. I live in a house now but I do have an older RV, and I will be using this there also.