RvRev2 ...... I didn't think about the level indicators, but they seem to be less false readings. I have heard about using Calgon in the tanks to loosen up the junk. Well as I have read that the Best thing for holding tanks is Water. I have used some Bleach in all tanks with water for the winterising season. I do drain the tanks before winter.
Just my 2 cents
Wayne & Marti ....Yogi the spoiled Dog
2012 Ford Lariat 4WD PSD Dually LB, Aux Tank 50 gal
2010 Designer 37 RLQS, 5th Airbourne w/Sidewinder