I've been testing the salt level in the pool since it was switched over the end of August (a month after the pool was filled). The Taylor salt test was always neck and neck with the read out on the PDA for the salt level.
Yesterday and today the salt test readings have been 2400 and 2600. I ran the test twice yesterday and twice today. Both days the reading on the PDA has been 3100.
Water temp is 66 degrees.
I found this quote from a post by JasonLion when I was trying to find the answer. "Pool store test results are legendary for being wildly wrong sometimes. As long as the SWG appears to be working, trust it's salt readout over the pool store. The only times when a SWG salt readout is normally wrong is when the water is cold or the cell is about to fail. When the cell is failing the salt level will read lower than actual. It is more or less unheard of for the salt level to be wrong high, and common for pool stores to be way off, so I wouldn't worry about it."
I just had pool school on Friday, and the guy told me to add salt when the level was down around 2800. So the test results have me concerned. I had just switched from testing every other week (weekly the first few weeks to get used to the test) to once a month. I think I shouldn't have done that.
So, is there something wrong with my test? The code on the bottles is April 2016. Or does it not work as well in cooler water temps? (66 today)
If anything, I'm struggling to keep the FC lower within range. It was 9 yesterday and again today. Yesterday I reduced the pump run times. Maybe that takes a day or two to bring down the FC.
But if the FC is still in the pool, doesn't that mean the salt cell is 'happy'?
And the water looks great.
Thanks. Just when I think I'm sailing smoothly along, I get this little blip....