35,000 gallon in ground vinyl pool, SWG
A few years back this forum helped me realize low CYA was my major problem (0-10 CYA in a Salt Water Pool). Once I got it up to 70 using the sock method I have a crystal clear pool that's very easy to maintain all season.
My problem is the low CYA happens every year, and I have to go through all the trouble of adding stabilizer in the sock method for days until I get to 70. What could cause loss of CYA every single year? Why does my CYA stay perfect in the open season but deplete over the winter/spring?
A few years back this forum helped me realize low CYA was my major problem (0-10 CYA in a Salt Water Pool). Once I got it up to 70 using the sock method I have a crystal clear pool that's very easy to maintain all season.
My problem is the low CYA happens every year, and I have to go through all the trouble of adding stabilizer in the sock method for days until I get to 70. What could cause loss of CYA every single year? Why does my CYA stay perfect in the open season but deplete over the winter/spring?