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Old 06-26-2020, 05:33 AM   #1
Rivet Master
2019 25' International
Washington , Washington, D.C.
Join Date: Oct 2014
Posts: 1,180
Blog Entries: 1
Tank Sensor Cleaner

Have you used a tank sensor cleaner and did it work? i.e. did your sensor start operating correctly?
Background: The last time I dumped my black tank, the sensor read 95% versus 0% after emptying. A few minutes later it was showing 90%. I'm very sure the tank had emptied because I watched it going down into the septic system. I then used the flushing cleaning function in black tank and then it showed 0% (yay!). However, at end of the day, it was reading 90% again. What gives? I'm wondering if using something like in the link below will help? And also wondering if it could be debris on the sensor. BTW - I am one of those people in the "No TP in toilet" camp; but do use the toilet for its intended purpose. Thanks for any insight.
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Old 06-26-2020, 07:38 AM   #2

2003 25' Classic
Houstatlantavegas , Malebolgia
Join Date: Jun 2007
Posts: 19,552
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I used the Geo Method once years ago and have not had a concern since.

I do flush well after each trip, drive at least 50mi before dumping,(sloshing the poop helps), use Happy Camper and add an ounce of Dawn duck soap once and awhile.👍

Disclaimer...'Cloudsplitter' has the older style sensors.

I’m done with ‘adulting’…Let’s go find Bigfoot.
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Old 07-06-2020, 06:16 AM   #3
Rivet Master
2019 25' International
Washington , Washington, D.C.
Join Date: Oct 2014
Posts: 1,180
Blog Entries: 1
Hi Robert Cross,
I wanted to give you an update on my black tank sensor problem. I kept having issues with the black tank sensor until yesterday when I pulled into Hadley Campground in Maine. Eric, the owner and 'honey wagon' operator solved the problem, I do believe. Before he emptied the black tank, he had me fill the black tank to the white collar you can see when looking down into the toilet. It is where the bottom of the toilet meets the floor and is clearly visible). When that was done, he suctioned out the black tank and for the first time in weeks, the black tank sensor was at 0%. He gave me some other advice that might be helpful to others:
1) Do not put TP in the black tank. Over time, bits of the TP will compact into the valve or seal and eventually this will cause problems. He sees this a lot.
2) When you poop, flush the waste and then fill the toilet bowl full with water (which you can do with a light touch on the foot pedal in my model) and empty it into black tank.
3) When possible, empty the black tank when you break camp and then pour 5 gallons of water into the toilet so it sloshes around and keeps sensors and tank clear of debris. (I think I'll throw some water softener into this based on the recipe Robert Cross linked me to).
He was able to determine nothing was wrong with my valves because there was good suction during honey wagon operation.
Happy trails again!
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Old 07-06-2020, 06:50 AM   #4
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2019 30' Classic
Canfield , Ohio
Join Date: Jul 2015
Posts: 2,522
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I'm with Bob. We use the Geo method. We have not bought an expensive black tank sanitizer in over two years. We use Tide liquid detergent and calgon liquid water softener (the only place that seems to sell it is Walmart).

No smell, no clogged sensors.
Tom & Doty
2019 Airstream Classic 30 Twin
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