We just finished up with a couple of days of heavy rain which brought the pool level up around four inches. I started my SWG on a shock cycle yesterday . I did a full set of TF-100 tests today (minus CYA which will be a whole other thread on that chemistry question) and got mostly what I expected given dilution. The surprise was PH which went from 7.5 to somewhere above 8.2 in that timeframe. I would have expected it to drop with rain.
Any insight?
Any insight?