Have a new 20 gallon long AIO innovative marine I was gifted by a student (High school marine teacher here). I am getting it up and going soon, and ordering all my tools like an ATO system and protein skimmers. My question is, what is a good stocking list of fish for the tank. I would love some cool fish (aka unique fish), and some neat corals (I have 1 AI prime mounted above it so looking at some colorful micrommusa and maybe some birds-nest ). Will y'all give me any stocking options for fish and also how many small hermits or members of a clean up crew I need. I have 1 touch tank rn thats in my classroom and I can never get the amount of tiny hermits right it seems.