Hi all, so last year when I was brand new to my pool everyone here was extremely helpful in getting me on my feet. I had a persistent issue with high CYA (110) and I took the advice of members here and installed a SWG and everything worked out great.
This year I did the opening myself and everything is going well except my CYA some how went from 110 to 40 and the salt went from 3000 to 1200. I did not do a major drain down of my pool at closing, however, I did have to drain about a foot of water frrom the pool twice this winter, and then I did another foot in the spring (accidently did more than I wanted because I unplugged the pump but it had a siphon and it drained slowly all night without me realizing). I added back about 9 inches of water when I opened.
The issue is, my Circupool SWG is telling me my salt is 3400 but using the TFP-100 salt test I get around 2400. Based on the pool math calculator, the 8 bags I added should have been enough to get me to 3000ppm but I am not 100% certain the gallons of my pool. Also, my salt test kit bottle #1 says best by 4-2023, bottle #2 is unreadable or missing a BB, so I dont know if that can play a role. (I thought I bought the kit mid summer last year).
It seems a huge drop for not a huge amount of water change. I really dont think I changed more than half of my pools water, that is why I am leaning towards believing the SWG salinity reading. I alsso don't want to add CYA and get back into the high CYA isssue I had last year if the reading is wrong. I am at 40 and pool math is recommending 60 for a salt pool. I struggle to do the CYA test, i keep thinking i see some of the dot from like 70 to 40, maybe even a little less.
Thanks for all of your advice as always!
This year I did the opening myself and everything is going well except my CYA some how went from 110 to 40 and the salt went from 3000 to 1200. I did not do a major drain down of my pool at closing, however, I did have to drain about a foot of water frrom the pool twice this winter, and then I did another foot in the spring (accidently did more than I wanted because I unplugged the pump but it had a siphon and it drained slowly all night without me realizing). I added back about 9 inches of water when I opened.
The issue is, my Circupool SWG is telling me my salt is 3400 but using the TFP-100 salt test I get around 2400. Based on the pool math calculator, the 8 bags I added should have been enough to get me to 3000ppm but I am not 100% certain the gallons of my pool. Also, my salt test kit bottle #1 says best by 4-2023, bottle #2 is unreadable or missing a BB, so I dont know if that can play a role. (I thought I bought the kit mid summer last year).
It seems a huge drop for not a huge amount of water change. I really dont think I changed more than half of my pools water, that is why I am leaning towards believing the SWG salinity reading. I alsso don't want to add CYA and get back into the high CYA isssue I had last year if the reading is wrong. I am at 40 and pool math is recommending 60 for a salt pool. I struggle to do the CYA test, i keep thinking i see some of the dot from like 70 to 40, maybe even a little less.
Thanks for all of your advice as always!