I have been reading this forum for some time now, a lot of useful information! Finally I am ready to post.
We moved into our new house with IG 32k gal pool a couple of weeks ago and finally I am getting more time to take proper care of the pool (so far have only been adding some bleach).
Previous owners used pool maintenance company, according to the logs I was able to get they were just putting trichlor tablets + adjusting pH as needed. Being concerned about CYA levels, I immediately removed the tablets from the pool and switched to liquid bleach. About 1 week ago I added bleach to raise FC to ~ 18 and let it drift down to 4.0. Since then I have been cleaning filter cartridges every 2-3 days as the pressure quickly raises to 28-30.
Below are yesterday's test results:
CYA ~ 200 (had to do 2x dilution to make it readable)
The water looks nice and clear. I added bleach and muriatic acid as suggested by the pool calculator to raise FC to 4.0 ppm and lower pH to 7.4.
Now to the questions:
1) Given the CH and CYA levels, I understand that water needs to be replaced, but with outside temperatures around 95 this might not be feasible. Can I wait for a couple of months or should I start gradually replacing water?
2) I reprogrammed pump run time from 13 to 8 hours per day. Water stays clear. Any suggestions on the run time (more/less/stay the same)?
3) What could be the reason for raising filter pressure? Do I need to keep adding chlorine and cleaning filter or is this a sign of the cartridges going bad?
Thank you in advance for all answers!