Last fall when my pool water temperature was in the 80s my salt reading from the Pool Pilot confirmed with Aquachek salt test strips was 3,400.
My water temperature is now 55 degrees. The Pool Pilot is now reporting a salt reading of 2,800. I have not drained and replaced water. I still have my winter cover on the pool.
I can think of several possible explanations.
1 The Pool Pilot salt readings are affected by the water temperature & you should ignore the reading until the water temperature reaches a certain temperature.
2 The water has thermal layers or the salt levels can vary in the pool until the water circulates properly.
3 I need to clean the plates. (The plates were checked last fall & were in good shape.)