I am starting my tank and my original plan was to do live rock and fish at the recommendation of my LFS
. I have about 20lbs of live rock at the moment in a 30 gallon tank. I am getting all kinds of hitchhikers with the rock. So far I have 2 starfish, either a bristle worm or fire worm (still trying to figure that out), and a couple of feather dusters. That's just what I've seen. Being new to this, I'm afraid of getting something in my tank that I don't want. My question is how beneficial is the live rock when cycling the tank, and... Now that I have the live rock is it too late to go back? Anyone have some advice? Am I too worried about picking up something bad in the live rock? Stories of 2' bristle worms are freaking me out!!! Thanks everyone!!