All I can think of! Strange.
As you know, I recently finished my SWG install. I have an estimated 44,000 gallon pool based on measurements and based on how the pool reacts to chemical additions.
I added thirty 40 lb bags to the pool. A day later (pump running 24/7) the SWG says low salt, below 2500 ppm, AquaChek test strip reads 6.2 - 2830 ppm.
I added 5 more bags of salt this morning (200 lbs), SWG now says 2800 (getting there), test strip reads the same 6.2 - 2830 ppm. Pump still running non-stop. Also, I ran my robot last night and early this morning for a total of 6 hours, test came out the same before adding the salt as it did last night.
Pool temp is 55, but even letting the test sample sit in the house to warm up hasn't affected the results.
Today and yesterday are the first time I've tested for salt. Am I doing something wrong? Although I have more salt on hand, I'm reluctant to add it until I know the test results are accurate.