I'm in Southern California and my pool got a lot of dirt and ash dumped on it from last week's wildfires. The CH has been rising steadily from about 200 when the pool was filled in March to 500 about 6 weeks ago. My most recent test was 900. Granted, this was done by the young kid at my local Leslie's, but I presume it's accurate to +/- 100 ppm.
He mentioned something about waiting until the spring to do a drain and fill. Does this make sense? What are the consequences of high CH?
CL ~6-8 ppm