I've always run my ph around 7.2 with no problems. Now that I have a SWG and have read the Pool School section on SWG water balance I see the ph reccomendation there is 7.5-7.6. I'm confused: I thought SWG's cause ph to drift up, so wouldn't one want to start in the lower acceptable range so that when the ph went up you wouldn't find yourself having to bring it down so much? Thanks for the help, I always learn so much on TFP!