I moved away from my house for 4.5 years and recently moved back in. After finally getting the water under control after the pool service managed to run the numbers out of control (280+ CYA) I am now dealing with the issue of high pressure. I bought new cartridges about 5 years ago. They look pretty good, no tears, and I have hosed them down well. From what I recall; clean operating pressure was 10 PSI. Now it's more like 18-20, and after having to do a 75% water replace to fix the water, clean filters are giving me 24PSI.
Any suggestions on what to do? I haven't done the filter soak yet, that's me next troubleshooting step. Can the soak yield a big change? I know what completely decrepid filters look like and these still look pretty good after 5 years, but do the cartridges get internally and irreversible "spent"? Looking for advice before I proceed.