This tank setup was a breeder for perculia clowns.
Could upgrade to a 40 gal
breeder or even 65 gal
tank pretty cheap with the same stand. The benefit of a breeder is that it has more surface area than a conventional tank. 36" long x 18" wide x 12" high vice 36" x 12" x 18".
More surface area equals more gas/oxygen exchange capabilities (capable of sustaining more fish ie able to breed lots of little critters but not necessarily have lots in it for keeps. Like a fish store has.).
Yes you can have the damsels and clowns in it Even throw in a blenny and some coral. With the shorter height tank lighting is easier to accomplish without high dollar stuff.