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Old 03-30-2016, 04:54 PM   #11
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Join Date: May 2015
Posts: 485
I've never owned an RV with accurate tank sensors. In fact, I don't think I've ever looked at mine in the current RV. You will know for sure when a tank is absolutely full and must be dumped, quickly, when water backs up in your sinks, shower drain and toilet, not necessarily in that order.

--2005 F350 Superduty Crewcab, 6.0, 4wd, short bed, 3.73 gears;
--2016 Montana 3711FL, 40'
--2014 Wildcat 327CK, 38' SOLD
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Old 03-30-2016, 05:27 PM   #12
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Join Date: Dec 2015
Location: West Hills, CA
Posts: 149
I wondered the same thing about the rubber pieces. I use a funnel to shoot the Geo mixture past the toilet stopper (rubber edge). Will need to examine the whole system to see if there are other rubber connector pieces that can be damaged.

I'm not a full timer so I just mix the three ingredients before heading out in an empty water bottle then shoot into the tank after I flush. I did notice the water bottle getting warm when they are first mixed, I wonder if they lose their effectiveness when pre-mixed and sit for a while. Hey s*!t (<- "stuff") happens

2015 Rockwood 8289WS
2003 Dodge Cummins w/Banks 3:73
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Old 03-30-2016, 07:36 PM   #13
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Join Date: Dec 2010
Location: East Berlin
Posts: 613
Regarding the GEO method, I do not use the bleach. Most soaps including the cascade dishwasher soap is antibacterial. Have not had issue with odors. I only use this method for the gray tanks. As posted earlier I use a natural enzyme based treatment for the black tank, I have added the fabric softener to the black tank 1/3 filled with just water. This was more for valve lubrication than stuff sticking to the side walls.

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