I just installed the sytem 2 days ago and the LCD screen keeps showing 2700 which I presume is the salt level. I've tested the water with Aquachek test strips and it shows 3450ppm. What gives? The sytem also gave me an error alert that the level was low so I'm not sure what to think? I'm going to have the water tested at the pool store as backup but has anyone else noticed lower levels from their systems?