I've got a 350 gallon tank. 6 foot by 3 foot deep by 31 inches tall. Pretty lightly stocked for the size tank, Right around 13 fish right now. a larger wrasse, looks like a malnouris wrasse, 2 smaller wrasses, a shrimp goby with two pistol shrimp, a dragon wrasse, a fully grown black tang, a fully grown foxface rabbit fish, fairly small Bellas Angel, a small caribean blue tang (about the size of a fifty cent piece - he's the little tang that can though, he swims to keep up with my black tang constantly), Royal Grama, lawnmower blenny, starry blenny, canary blenny. It's a mixed reef of LPS, SPS, and some ricordia and a very large toadstool. A larger beautiful elegance coral I don't want to see damaged or stunted by lack of food. My goal is to have a nice big deresa Clam at some point. I have almost no tube worms, I was hoping they would start coming in at some point. Tank is around 10 -11 months old. No tube worms yet.
I've always heard it's extremely hard to get copperbands to eat in captivity. I've tried them with previous tanks and had issues getting them to eat anything. That'd probably be the safest. I've never tried marginalis butterflies. Gives me some ideas though! Which is what I needed.