Hey all. My pool was first opened April 2020 the required amount of salt was added - 400lbs. I've never added any since. In my tests throughout this season my K-1766 test kit (which seems dead accurate) comes back with a salt level of 4200 ppm which according to the Intex manual is on the high side. Just last week, my SWG starts throwing a low salt error. I tested the water again and I'm still around the 4200 ppm mark. Any ideas? I checked the SWG plates thinking they might need cleaning (have never done it) but they look like new - consistent dark color. My gut says my test is right and the SWG sensor is off but given I've never added salt, seems like it's feasible the SWG could be right. If the SWG is wrong, any experience with Intex on what I need to replace? Thanks!