I ended up getting a Tomini for my 50 gallon AIO. He’s been in there six weeks now and is doing great. Definitely a cool fish. He’s about 3 inches from tip to tail, and still looks small in the tank. He was pretty shy at first, quick to hide in the rocks whenever I moved around the room. But he’s gotten more bold recently and is now mostly out and about, constantly picking at the rocks and glass. Super fun to watch.
This thread was helpful for me, as well Jay Hemdal’s formula for calculating appropriate tank size for various fish.
Does yours eat nori? Mine won’t. He joins the feeding frenzy with the other fish for mysis, flakes, etc., and seems to get plenty of algae grazing on the rocks and glass.