I'm in your exact same situation (first SW tank)...just about 6 weeks ahead of ya. I bought my live rock off of kijiji so it was already cured. I had tons of hitchhikers that were both good and bad and even some corals. Everything survived my cycle (except a colt coral) and I even added pure ammonia to give it a kickstart. I did not use lights for 4 weeks and a colony of button polyps (paly's), some sea-mat anemones and a colony of mushrooms managed to tough it out. I didn't really worry about whatever was attached to my live rock because it wasn't part of my grand plan and I figured that if anything managed to survive then I would give it a chance...if not then who cares...I paid for the live rock for its filteration and not for the freebies that came with it.
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