My neighbor has a Hayward Aqua Rite T-15 that I try and help him with. It is displaying the salt level at 4500ppm on instant and average. The Taylor test kit shows 3600ppm. It is not flashing "high salt". All the other diagnostic readings are good. I usually see the display reading lower than the Taylor test when it is about to die, not higher. The cell is newish.
Is that common?
Is that common?