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Old 06-08-2015, 02:15 PM   #1
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dirty tanks - need recommendation on what cleaner to let soak in tanks.

Having extreme difficulty in getting sensors to register correctly. Any advice would be appreciated. Thanks

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Old 06-08-2015, 02:20 PM   #2
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Dump the tanks and refill approx 1/3 and add Dawn ( about 6 oz. ) . Now take a ride and dump when you get to your next destination.


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Old 06-08-2015, 02:20 PM   #3
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1998 Kit 23' TT, 210 AH, PM4B-45, RV-30S PWM, 280w solar, Trimetric, Wave 3, Samlex PST-150w
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Old 06-08-2015, 08:05 PM   #4
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Happy Camper Extreme Cleaner
EXTREME CLEANER - Happy Campers Organic RV/Marine Extreme Tank &
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Old 06-08-2015, 08:13 PM   #5
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Originally Posted by jackfish View Post

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Old 06-08-2015, 08:15 PM   #6
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Never had a problem with any of our previous rigs. Used chemicals and waited till the tanks were 3/4 full.
Now the previous owner of the Magna must not have known how to treat the tanks as the black always read 1/4 full when nothing would come out. Over the last few weeks I've kept water in it and fresh chemicals plus used the built in tank flusher. For the first time I got the black tank to read 0% full. I think there's still some "stuff" in there because I added a couple gallons of water and chemicals and now it reads 1/4 full. Making progress!!
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
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Old 06-08-2015, 08:21 PM   #7
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I agree with using the Happy Camper. I've been using it for years and no problems. The extreme is supposed to do wonders.
Tony & Ruth........... FMCA#F416727
Newmar Dutch Star 4320, Spartan MM Chassis, Cat C9, Jeep Grand Cherokee,with Hemi, hooked up with a Blue Ox Aventa LX, and Brake Buddy.
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Old 06-09-2015, 05:28 AM   #8
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Another way to clean your tanks, Dump a bag of ice cubes down your toilet and take a drive, you will be surprised the amount of crud that comes out of your tank.
Bob & Karen & Buddy "yourkie"
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Old 06-09-2015, 05:46 AM   #9
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I've used a cup of bleach and a cup of Calgonite dishwasher liquid per 20 gal of water. then 2/3rds fill tank with water. Let it soak for a couple of days, take it for a good drive, let it soak for a couple of days. take it to the dump station and dump. Flush well with fresh water. We always put 2-5 gals of water back into the tanks with a good shot of Calgon (1 oz.), after we dump. The electronic sensors seem to get screwed up by just the smallest amount of waste; toilet paper. onion skin, whatever.
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Old 06-09-2015, 05:48 AM   #10
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From time to time we'll do the dishes in a large bowl instead of the sink. When done I'll squirt more dish washing liquid into it, and dump it in the black tank with a good flush. It stays until I dump.
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Old 06-09-2015, 06:27 AM   #11
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Another vote for extreme Happy Camper...
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Old 06-09-2015, 06:53 AM   #12
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Happy Camper and Calgon for me, no issues for me!
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Old 06-09-2015, 07:01 AM   #13
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RV Digest it is awesome:


Once clean, we have our own home brew that works for us:
Equal parts
Pine Sol
Dawn (ONLY Dawn - best grease cutter out there!)
Calgon (Liquid)

We make a gallon & add 4 oz RV Digest it and dispense via the blue streak:

Chemical Dispensing Systems for RV & Marine | Blue Streak LLC

Oh, we use the same home brew in our Galley & Gray tanks as well. Never had a problem.
| 2017 Berkshire XLT 43A + Ultrasteer Tag | Blue Ox Avail + KarGard II |
| SMI AF-1 Air Brake | 2016 Jeep Cherokee Overland TOAD | Pedego Bikes | RVM 091

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Old 06-09-2015, 07:08 AM   #14
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Dawn dish soap and some Calgon water softener--dissolved in water before pouring down into either drained tank. Add about five (5) gallons if water and then drive to your destination. When leaving, do a dump, rinse well, and repeat tank doseing. Do this a few times and things will start to smell "rosy" (yeah, sure).
We did this on our 1989 and now sensors work well.

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