Hi TFT, first post here - I'm usually a reader but I'm stuck on this one. Big thank you to everyone that answers all of the questions posted here. Best forum I've ever read!
I am just coming off an AA treatment. All is going well. Thursday will be the two week mark and no reappearance of stains and CL is holding.
Now I'm working to rebalance everything else and I'm having issues w/ my salt readings. Shortly after we reopened the pool (about three weeks ago), the salt level was within range albeit at the lower end (if memory serves me it was 2,500). The pump prefers 2,700-3,400 and I think will produce CL down to 2,200. Anyway I added some salt to get it up to preferable levels. Two days later I got a "low salt" error message on my Aqua Plus. It made no sense based on my prior tests and adding salt so I retested. AP said 2,500 but my K-1766 drop test said 3,500. I've always had a small delta (~200ppm'ish) but not one like this. I then dug out a TDS EZ meter and it read 2,700 (pretty close to the pump reading). Still not wanting to think my test kit could be off, I bought and tried the AquaCheck salt test strips. They also agreed with the pump.
I reached out to TFTestKits searching for any thoughts --- love !! --- and Rebecca helped me quickly replace my reagents (one of the two was probably past its prime). The postman probably thought I was crazy as I met him at the box to grab the new reagent and test but I needed to know! Retested with two new reagents for K-1766 --- still reading at 1,000ppm higher than the pump. Grrrr
Today I took the salt cell off to see if that was creating any issues. It was clear but I cleaned it anyways. Reran all tests (TF-100) and all salt testing options I have.
Temp - 73 (water has been ~63 since pool opening up until yesterday when it hit 70)
CL - 3.5
CC - 0.5
pH - 7.2
TA - 80
CH - 480
CYA - 60
Borates - 50
Pump - 3,500
Test Strips - 3,630
TDS EZ - 2,990
Other than AA and the salt mentioned above, I've added some stabilizer and a bunch of Calcium Hardness as I was running way low. During AA I used bleach to keep CL in line but did turn back on the SWG late last week. The last two days my need to add bleach has dropped so I'm pretty sure the SWG is producing CL, the reading is just so far off the drop test it has be puzzled. I'm also worried about having to keep salt levels 'inflated' to keep the pump happy.
If my salt level really is 4,600 does that hurt my pool or equipment?
Thoughts on why I'm getting such a variance between the pump and the drop test?