We are 5 weeks into cycling our 55 gal swt. We have damsels, various types of hermits, snails, peppermint shrimp, lots of mushrooms and polyps (they came with some of the rock), and some corals. We have been given the offer from a private seller, who used to be a LFS owner, to sell us lots of live rock that he has had in quarantine. Not sure for how long. It's from a client's old tank. We saw it last night when we went over there to buy a 120 gal tank at an excellent price. The live rock is beautiful and it's at a very good deal. Owner needs the money and is hot to sell. Wife is pregnant - we saw and talked with her. There is a huge shelf piece that we really want. The only problem is that the rocks are full of big (tall) aipstasias. Should we buy the rock? We have two peppermint shrimp that ate the two aipstaia's that hitched a ride with another piece of rock that we got last week from a LFS. We do not have our own quarantine tank.