Took a week to receive replacement thermistor via Amazon, my Aquarite is now back functional. I really did not know this was a common thing. I almost took the plunge and buy a new Aquarite panel. Actually it was fairly simple and cost me less than $20 instead of $650. Anyway in the mean time I added too much salt, currently reading 3600 ppm. Should I drain some water and refill ? Can I use SWG now or wait till salt level is below 3200