<a href=showthread.php?s=&postid=13294097#post13294097 target=_blank>Originally posted</a> by tmz
Generally nothing is wrong with hitchikers. They are a great addition to the reef. Except the bad ones,such as aiptasia,mantis,gorilla crabs etc. Segregating new rock can offer an opportunity to cure it some more limiting the potential for nutrient increases in your display and give you a chance to observe and remove unwanted hitchhikers.