I have to close tomorrow (9/21) which is a little early for me, but we are going on a 10 day vacation on 9/27 and want the pool all wrapped up before I go. I usually bring FC to SLAM levels before closing. I've always had good luck with this, opening clear in the spring. I happen to have a bottle of PQ60 and wondering if adding that would be of any use. I know the high levels of FC will eat up the PQ60 but wondering if I get any additional protection from adding it on top of SLAM. Right now my FC is at 5.0 for CYA 70. So just about right. Thoughts?