Very nice looking system! You've got a sweet collection of corals...lots of color and diversity.
I'm not a member of the tang police(I keep a 3"-4" hippo in my 55)...but you do know you may have issues with tangs in such a small display. There are folks that will object to any tang in a 55 display...but my hippo has been fine for about 6 months now(I do have plans for a larger display and should have it established and developed long before mine gets too large)...plus I kept a yellow in my 58 gal fish only for well over two years until he met a very unexpected death. Just wanted to mention that there are legitimate concerns about keeping tangs in smaller systems...but I'm betting you know that huh...
I wish you continued success and keep us posted...I always like a treat for my eye candy addiction!!