<a href=showthread.php?s=&postid=11223605#post11223605 target=_blank>Originally posted</a> by sir_dudeguy
Personally i wouldnt put live rock in a QT because ich goes through a life cycle where it live on the fish part of its life, and then on rock for another part of its life. It can live in the rocks for like 6 weeks or something without a fish...
Say you get a fish in that has ich...the ich passes to the rock. You wait a few weeks and put that fish back in your tank and then get a new fish for your qt...that ich could still be on the rock, and could then go to the new fish...theoretically.