Clowns in a 14 biocube is a matter of contention. Some say its fine, some say its bad, some say it's ok with certain provisions. I tend to err on the side of caution with my fish. This is not a slam on those who feel otherwise, but there is some incidental (not scientifically experimented) research indicating that fish can be physically damaged by too confined a space through skeletal stunting and deformation. Remember that these are animals that evolved in millions of gallons.
Someone stop me! Please! But... not just yet...
55 Gal Tropical FW
55 Gal Mixed Reef