Winterize in Southern California

[chem geek]

Your pH is too high and needs to be lowered. Part of the reason for the high pH is your high TA. A saltwater chlorine generator pool tends to rise in pH so keeping the TA lower at around 70 ppm helps as does having the Cyanuric Acid (CYA) at around 80 ppm and the FC at 4 ppm (minimum) helps to reduce the generator on-time. You can also use 50 ppm Borates, but can do that for next season if you want. You didn't tell us your CYA level nor your Calcium Hardness (CH). You should get a Taylor K-2006 kit via this Amazon link for the K2006A or this one for the K2006C which will give a small amount to this forum (the price on Amazon for this test kit is usually excellent, however).

By the way, if you are adding 1 gallon per week to your 24,000 gallon pool, then your TA should be dropping by about 21 ppm per week. Since it is still fairly high, are you adding anything to keep the TA higher and if so you should stop doing that and let the TA drop to around 70 ppm.