I have a cycled tank with some snails, hermits, macroalgae, live rock rubble, and a damselfish. I would like to add a larger reef rock and start introducing coral. 28g red sea reefer nano. All my water, rock, and livestock came from a single LFS. Should I purchase live rock from that same store (expensive, not a huge selection) or purchase dry rock online? If online, it looks like guaranteed clean rock is never in stock. Advice? Thanks!