The only reason I want to dip the live rock is that I had a 20 gallon tank that I'd set up (this was long ago by the way) and had QT the cured rock to make sure I didn't have any die off plus for parasites, hitchhikers, etc. and after a few weeks when all looked good, I put it in my little tank and found these red earthworm looking things (they were smooth and slimy looking as well as LONG) crawling out of it one night. I tried to find out what they were but couldn't find a picture that looked like them. I know that some worms are good but I don't like them in there. Yes, I'm being a girl about it...LOL!