Dipping corals

Hello,

I am about to break my tank down in a few minutes to dip some zoas. I have discovered some zoo eating Nudi's in my tank and want to attack the problem before it gets any worse (plus I want to redo my aquascape. I have two questions. 1) What cannot be dipped in what. for example, I heard SPS don't usually survive a FW dip. I have all types of corals in my tank, too many to list but a big variety. 2) I noticed some fuzzy white sponge looking stuff on the bottom of a bunch of my rock. It is white fuzz with what looks like little lightning bolt shaped things coming out of it. Any ideas what this might be? I will take pics when I break my rock stack down.. Thanks in advance, Dan
 
Top