In the heat of yesterday's late afternoon sun, the kids and I left our pool and ventured across the street to our community pool, which is cared for by the HoA. Just for fun, I brought my TF-100 along to see what I could learn. This pool is relatively new and was put into service just about a year ago. Other than there being a bit of dirt/sand on the blindingly-white bottom, the pool looked great and the water was sparklingly spectacular. Then I started characterizing the chemistry:
I'm a bit surprised by the pH. I have a hard time keeping mine within range, but I don't think I've ever seen 8.2 since startup. CH is the most inexplicable. I assume they use the same water that I do, and I have to add a fair amount of minerals to keep my calcium levels correct (fill water ~150 or so).
Since I know what I'm talking about (Thanks TFP!!!), the most concerning thing to me is the chlorine/stabilizer ratio. I would be targeting a minimum of 5-6 with CYA at 75, but the pool looks great. Is it correct to assume that 3.0 is high enough for disinfection? I'm assuming that they're using some sort of algae treatment to keep the pool looking so great with such low FC levels.
Anybody else take their chemistry fun set over to their local public pools and see what's happening?