Re-plastered with quartzite 3 weeks ago. Been testing a week or two on my own, and had pretty good results. Put in some more CYA through sock method yesterday.
How did my CH rise so much? Not sure I was accurately testing in the past, and I know we have issues with calcium in my area, but sheesh. Pool math tells me to drain 1/2 my pool, but everything else is fine, any suggestions?