I test pH and drop it to 7.4 prior to use. I do not use my SWG during spa use (even on the lowest output setting, it raises the FC too much for my liking). Afterwards, I test pH/FC/CC and then turn on the SWG for 30-60mins (low speed, no heater) to bump the FC back up and oxidize the bather waste a little. Then I dump it all back into the pool and let it run normally (spa spillway) for another hour.
I might use the SWG if I have a spa party but it's typically just me and the wife.
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