need opinions on new additions

Hello fellow reefers!

I wanted opinions and/or suggestions on adding a new fish to my tank.

Ive gotten my tank to be very stable and i really want another fish that is colorful active and that can live peacefully with what i already have.

The following is what i already have:

- clown
- sixline wrasse
- 2 BTA
- skunk cleaner shrimp
- coral branded shrimp
- some hermits & snails
- coral: torch, hammer, micro hammer, frogspawn, zoas, gsp, alveopora, xenia, dunkins, blastos, candy canes, & acans

equipment:
- 20 long tank (petco $ per gallon)
- 10 gallon sump
- protein skimmer
- ATO
- aquarium controller
(5 gallon weekly water changes)

also any suggestions on coral that i could add?

Thx :)

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