Aside from the corals I have two blue legged hermits, numerous astreas stars, and one of those fan hand crabs (forget what they're called!) we call him Mr. Fan Hands And, about two million hydroids and ten aiptasia at last count . I'm off to buy a new Joe's Juice this week since I'm using a friends leftovers, which may be old, but I'm also contemplating on a peppermint shrimp. I just don't know what else to do, the hydroids are ALL over the back wall, and slowly (actually quickly) killing off my green zoos that are attached to the wall. They were doing so well and in less than a week the hydroids have creeped up and stung two polyps to death. I fear I may have to empty it out and start over. Which goes to show- no matter how much you plan, always expect the unexpected.