Something missing here if we are able to read the two calibrated fluids correctly but not the tank water. Not using the same pot to set the meter for the 4.0 as the 7.0 as there is a second pot on the back? The idea of calibrating is to make certain the meter and probe can work at levels between 4 and 7, so something is missing on the idea.
Last edited by PlantedRich; 04-26-2018 at 01:11 AM.
Reason: correcting PC weirdness?