you can stock in a 1/2 gallon, so of course you can in this.
I'd say 2 clowns, maybe... or a fire dart fish. It all depends. Reasearch before anything. and 20 is nano. you'll do better in that section
"you can stock in a 1/2 gallon"
Holy ####, you stay away from fish, lest they end up in jars
I really hate topics like these. I did a year of research before setting up my reef tank, and that still wasn't enough considering I have had 2 crashes. You simply cannot expect to setup a marine tank a soon as you get an urge to do so. Furthermore, marine tanks under 33 gallons are very hard to keep from swinging around (stat wise).
If you are a beginner to saltwater, you could perhaps have a couple nano fish, and several corals.
Often quoted, the following statement is all too true:
"Beauty takes time, but disaster comes quickly!"
Do a lot of research (the pinned topics would be a good place to start) or consult an expert.
A user that frequents this forum, who is masterful at maintaining tiny tanks, is Donya
It would be a good idea to contact her.
If I seem harsh here, it's because I am trying to be. I am sick and tired of people coming on here and saying things like "How many nemos can I put in a ten gallon", then receive a reply saying you can't; and then do it anyways. It's tiring to see fish die
-Lynden