I have a Goldline SWG with the T-15 cell and have been having ongoing problems with it reporting low salt. It will read 2300 ppm when the Aquacheck salt strips report 3360 ppm. I have tried cleaning the cell, done the dilute MA cleaning (no bubbles) and checked water flow and everything seems right. Recalibrating doesn't hold the expected reading. The folks at Goldline told me it sounds like a bad cell, so a tech came out today. Unfortunately, I wasn't home to talk to him, but my wife told me he checked everything out and the only thing he found wrong was the pool needs about 125 pounds of salt. I just reran the salt test now that I'm home and the strip read 3360 ppm again. Adding that much salt will push me up by about 1000 ppm, according to the Pool Calculator. My wife said he tested the water with some "fancy device" (her words) and it reported the salt to be low.
It certainly makes sense to me, assuming the test strips are off by 1000 ppm, but I have never heard of these strips being that far off. The expiration date on these strips is Aug, 2009 and they've always been kept dry with their desiccant packet in-place.
If I add the 1000 ppm and my pool is already at 3360 ppm, is that going to push my salt up too high? I don't want to have to replace a bunch of water if his test was wrong, but it does seem to fit the symptoms I was having (Low Salt indicator).