So, I bought my 2019 Montana 3121RL 5th wheel in 2022 and soon after that even after dumping my black tank it showed half full, sensor was stuck. No problems with my two grey tanks. Also, recently after getting my Montana ready for summer travel (late start I know) I noticed some odor outside of it. So, I started researching cleaning the tanks out and what to do. There is tons of info out there on the web, basically a vast array of additives to put in and then wait/drive around for 45 minutes and then dump. I tried that last year and no luck. So, I then researched cleaning services and came across a company called “Kleen Tank” that does just RVs. A nationwide company with three franchises here in Colorado. Also, there is a video that a user posted below getting his tanks cleaned by the founder (hope that is alright moderator).
You need to watch this video; it is so educating. And just this last weekend I had a tech from the company come out and clean my tanks to new condition. WOW, I could not believe the stuff that came out of all my tanks. Took about 2.5 hours and was so well worth it too. They clean up to three tanks at a base rate and clean the hot water tank for free. Much calcium came out of mine.
Anyways hope this is useful to you guys and here is the link.
You need to watch this video; it is so educating. And just this last weekend I had a tech from the company come out and clean my tanks to new condition. WOW, I could not believe the stuff that came out of all my tanks. Took about 2.5 hours and was so well worth it too. They clean up to three tanks at a base rate and clean the hot water tank for free. Much calcium came out of mine.
Anyways hope this is useful to you guys and here is the link.
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