They are putting the finishing touches on our pool today and beginning to fill.
We're putting in 100% well water from our irrigation well (I should be able to get some tests done on the water tonight since we just had the tap put on it earlier today).
I have a SWG and am already planning on using liquid chlorine to maintain FC until I get the SWG up and running. However, I want to get some CYA in it as soon as possible. I'm targeting a final CYA level of 70.
At 12,500 gallons, pool math tells me I need about 7.3 pounds of CYA. I bought two 4# canisters at Walmart over the weekend. I was thinking I could take advantage of the non swimming time by floating a noodle in the pool while filling, and tying a nylon filled with CYA on each end of it. That would hopefully allow some of it to dissolve during the fill to be available when I finally got the water in place and added the bleach.
Somebody on this site told me the other day not to go from 0 to my final amount all in one step. So my thought is that during the fill, I can hang stockings containing one of the 4# canisters from the noodle. If that mostly or totally dissolves during the fill, it looks like per pool math, I would be in the neighborhood of 35-40 CYA.
With a full pool and the first 4# of CYA dissolved, I could then begin dissolving another 3# and adjust my chlorine as if I were at my final CYA level of 70. By then I should have the SWG in full gear and be able to fine tune it to a final target of 5 FC at 70 CYA. Once that second 3# of CYA dissolves, I would wait a week and test CYA, then add the additional 1/3 of a pound (or more if needed) based on what my CYA tested at that point.
Does that sound like a reasonable plan? I've read enough on this site to really want to make sure I get a solid handle on the pool's chemistry right out of the gate.