live stock wise ur maxed out.
The two clowns once settled will make sure they are the king of tank, unless you throw in a fish which will get you jailed by the Tang/whatever Police.
Becareful with what coral you put in there, because of that cleaner in that small of a tank.
Cleaners have a nasty habbit of bugging the heck out of some corals once they realize they are nothing but treasure chests of goodies right after u spot fed one. This is why i gave up on cleaners. They honestly present more headaches then they are worth, especially since the "Cleaning" aspect of it should definitely not be the reason u bought one.
And no do not put in a blenny. I do not recommend any additional fish because again, i think you will be max'd out with those two clowns as you progress in that hobby.
Your clowns may look small now ,but the female will grow at least a good 2.5 to almost 3 inches long, which is already pushing the limits of your tank, but thankfully clowns don't require much space other then the spot they decide to host.
