I started this 10 gallon nano tank about a week ago and just put in my first invert, an emerald crab. Eventually I am going to add corals and/ or anemones, but first I want to add fish. I’ve spent time researching my options and I want to go with a chalk basslet. Is there any other tank mates I could keep with him in a 10 gallon, or would it have to be a 1 fish only tank?