I have a nearly 20 year old 20,000 gallon vinyl liner inground pool that we have open from around Memorial Day until October 1 (or so) each year. Last year finding a reliable source of chlorine became practically a part time job and I was concerned about running out all season long. Looking at the stores now, looks like everything has switched to 'small gallons'--bottles somewhere between a gallon and half gallons-- it seems to still be expensive--and in some cases there are still limits on how much you can purchase. As a result, I'm considering switching to a SWG system. I don't mind the investment, but there are horror stories about ph, scaling and other problems on YouTube that have me concerned. Looking for some advice here...good or bad? Thanks in advance!