why not try some type of LPS coral ?? they are colorful and move quite a bit. as everyone else said, it is gonna be next to impossible to add a fish unless you get rid of the maroon. LPS come in all colors and sizes, so you could start with a
frag of say ... pink tipped frogspawn, and just keep growing that or add hammers or torches. they will all give great movement in a small tank.
