Originally Posted by atlfishes
This may have been answered above and I missed it, if so I apologize. I'm going to use uncured live rock to cycle the tank. Do I need to scrub it and cure it before I use it to cycle the tank. If not would I want to cure it after the cycle? Ultimately if I can't get all the bad stuff out by curing alone, is this done just to eliminate the smell? Thanks
Scrub off anything that looks dead, then put it right in the tank. If you know how to identify them, you almost certianly want to pull off any sponges, having been exposed to air they are quite likely to die. If anything else appears to die during the cycle, you can pull the rock back out and scub the dead items off again.
You don't want to scrub off anything that looks healthy. You may have some pleasant surprises on the rock! If you cycle a tank with live rock, it is completely cured after ammonia and nitrite have spiked and returned to 0.
Start your ammonia testing until you see a spike and a decline to 0, then test nitrite until it goes to 0. (If you're scientifically curious, you could test ammonia, nitrite and nitrate daily to watch the whole cycle.) At this point your nitrates should be high, do a big water change, and you're ready for your first fish. (And I don't recomend it be a damsel. Go straight for the clown if it's in your plan.)