When I said " get the biggest one you can" I really didn't expect this 180g tank to be mine someday. Here I am though, 7 months of weekly water changes later and not everything dies....yay? The kids love it, every week they say to keep it, so it's staying. Urchins surviving, two sea stars that make appearances, clownfish seem to be immortal, snails get eaten by giant hermit crabs and shrimp and I'm not sure if that's normal or not. I would really..... REALLY love a mentor that wants to talk about everything from bacteria to safe decorating. I don't want to hurt anyone more than I already am. Heeeeelllllpppppp.