This was my second time opening my pool, but the first after I closed it myself. The first opening was after the previous owners closed, and I opened it to a slightly green pool that took about 5-6 days of SLAMing before passing the Overnight test.
This year, I opened a little differently. I left the cover on while I filled the pool. While filling, I hooked up the filter and pump and as soon as the water was at the right level, I turned on the pump and added a gallon of bleach. Keep in mind that I hadn't been able to see the water yet. About 3-4 hours after adding the first gallon of bleach, I added another and kept the pump running. I let it run overnight and added another gallon of bleach in the morning. All of this was done assuming that I would open up to another green pool, so I figured I'd keep the sun off of it as much as possible until we were able to get the cover off.
Anyway, around noon on the third day, we removed the cover and to my surprise, the water looked just as we had left it last fall, perfectly clear. I tested the water and got:
CYA: 30 (somewhere between 30-40)
I say all this not to brag (well, maybe a little ), but to see if this is normal. I typically read on here about opening to a green pool and that was my only prior experience as well. I don't think I did anything special at closing; cleaned the pool well and raised FC to SLAM level, that's it. I didn't expect this, so I'm thinking there's something I'm missing. Too good to be true, I guess.
Just wanted to hear from some of you that have good experiences opening a pool.