On May 22, 2024, I purchased a house with an in-ground, plaster 15x30x4.5 kidney shaped pool (so figure 12,500 gallons) with a cartridge filter and hockey-puck chlorinator. It has been maintained by some local pool company and not by the previous owner. I tested the water for the first time today and, as I anticipated, the CYA level is 100+ off the chart! So, obviously it's drain and refill time, but that's not the point to this thread. It's been a LONG time since I last looked at SWG's. What's the latest and greatest out there nowadays?
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