Help please, I’m looking to purchase a nano-cube for marine use. I’d like to start with around 20G in size, and something that is a complete package. There are a lot of different choices out there, if anyone can give some tips. It looks like most of them don’t come with heaters, so I’m guessing I just purchase a separate submersible heater? I’m looking to put in some corals, anenomes, hermit crabs, star fish, shrimp, and only a few fish. I;ve seen the Eclipse 12G, but that seems too small. Currently looking at the Oceanic BioCube 29G that looks promising.