Septic tank control panel readout has changed

CoronCoron

Member
Apr 13, 2020
206
Boat Info
Sea Ray 290 Sundancer, 1998
Engines
(2) Merc 5.0 EFI
Hello - My tank readout has always been "empty, 1/4, 1/2, 3/4 and full".
The past month it has been "empty, 1/2 and full".
What can I do, if anything, to get the readings back to normal? When I have the tank emptied now when it says "full", the pumpout company readings are anywhere from only 20 to 25. This is a 28 gallon tank.
Any ideas?
 

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