When i first got my live rock for my 180 i cycled them 50lbs at a time in a large rubbermade tub. One for the 50 lb boxes came with rock riddled w/ aiptasia (crazy considering this was rock sitting in no water with just wet newspaper sitting over it) flakes
I threw all aiptasia covered rocks in a seperate tank and had them cycle for about a month with water changes every 3 days then threw in a CBB. It refused to eat anything...flakes,mysis, live brine shrimp, pellets, etc. and it eventually died.
after all that i tried a Kleins butterfly and this thing anhialated 50% of the aips in the first week. 3 weeks w/ no feeding and they were none to be found. I kept him in that tank for about 3 more weeks feeding sparingly w/ flakes making sure he got all the little buggers. eventually he ended up in the main display and took out my acans, a chalice, 1 out of 3 RBTA, and my tubs blues.
Point of story, Kliens work, but you might want a seperate tank to have him do the job.
HTH -Patrick