How to calibrate tank level panel leds

Marv Hoag wrote:
I have a 2000 Monaco and the led that display tank levels ( Fresh, Grey, Black, LPG, Battery ) are not reading correctly. If I try to calibrate one it changes another. Is there a correct method for calibration?

Yes there is.
Use plenty of water and dump your black tank every three or four days and most likely eliminate the need for chemicals by using this method.
Dump your grey tank after about 4 baths or let some out when it comes up in the shower.
Always keep a reasonable amount of fresh water with the indicator usually being fairly accurate here or if you can actually see it, like we can under the bed, then go that route to be sure of what you have. We usually carry a couple of showers worth unless planning some dry camping and in which case, take on a full 100 gallons.
Propane has it's own gauge right on the tank that's accessible from the basement, so that shouldn't be a problem, either.