I used the geo method on the tanks in the Elkmont. I had been having issues with the gray water tank gauges. It seemed to help a little, but has not totally corrected the gauge readings yet. It did seem to help clean out a lot of residual stuff that were in the tanks. I'm pretty sure that the previous owner had let the unit sit for long periods of times with waste in the tanks. I'll continue to use the geo method next year to try and get the gauges working better.
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