Just because you can probably doesn't mean you should all things considered. If you read the "non-forum" literature you will see most recommend much larger aquariums. Reason why again is because of total water volume after rock, substrate, and other creatures you may or may not keep and equipment.
To gregrocks - nice tank. Do you have a sump? Your sig says you do so I'm assuming it is set up within the 12 gallon. If so, you have more total water volume than the OP's 5 and you have more room for error.
Anyway - I'd vote no but you know how it goes. I probably shouldn't have replied because these typically turn into flame wars (this hasn't) like the "can I put a tang in a 20 gallon tank"...