We recently had a new digital Prologic unit installed for our SWG system....well, it gave me a salt reading of below 1200 for over a week even though I had added Salt. I was beyond frustrated because I had to leave town and nobody was going to care for the pool for an entire month. I was able to program filtering etc, so that worked while I was gone, however, as I was able to read the levels through the app on my phone the salt level all the sudden sky-rocket to 4200 ppm.....I did a manual test today and the test strips stated that the level is above the number 4 on the strip which supposedly equals 1200 ppm.
I am at a LOSS, I have no idea what is going on anymore....digital unit says its way above 4000 and manual test strip says 1200....on top of it all the green monster is alive and well and I am ready to fill the dang thing in with concrete (just kidding, I am just super frustrated).
Could it be that the cell went bad? And if so, should I replace T-15 with a T-9, the pool is barely 20K gallons.
Read outs today:
Hardiness: very low
Total chlorine: very low
Free chlorine: very low
Stabilizer: below 50