Yes I am with you on QTing everything. I have a 20 gallon frag tank that will be fed one way from this system (via AWC system) and it will house all new SPS for several weeks/months before they go in the main tank. I was thinking that if I do go with the new live rock I will place it in a small tank (I have an extra 10 g) and observe it for some time to look for the typical pests that can come in with said rock. As far as aiptasia go, I feel like no matter how hard most reefers try, they eventually see them in the display. I plan to deal with them proactively - peppermints and one of the first fish I will add is a matted file fish. So that is my plan for now. I haven't pulled the trigger on the rock yet so still mulling it over.