I managed to get a really good deal on Live Rock at two different LFS
's yesterday (Local being about an hours drive from here). I got just under 20 lbs from each store and put it all in the tank. The rock at both places had been in their tanks for a while. I also put in a 20 lb. bag of commercially available Live Sand.
A couple of hours later a snail and an urchin poked out of the rock and started crawling around. The urchin is about the size of a silver dollar and how he didn't get squished (or me skewered) during the handling of the rock at the LFS
is beyond me. On closer inspection one of the larger rocks appears hollow and I think they were both in there.
As far as cycling goes, should I throw a shrimp in there? I'm a little concerned about the guests health during the process but I've got no where else to put them.
As far as feeding goes, should I put anything in the tank for the critters? I assume the snail will continue eating stuff off the rock but I don't know about the urchin.