Stocking 20 gallon recomendation

Hey all,
I have taken care of a starfish and a yellow tail damsel for a year now but the damsel died when I was on vacation since the neighbor I hired to feed the damsel forgot to....fml. But a family friend just gave me a 20 gallon or 15 gallon tank. So I thought it would be an easy time to upgrade if I just move one starfish.
Any who cares about that. I want to get a pair of clown fish that are tank raised in this new tank, two snails, and my current brittle star. I was thinking of adding a goby since they are small or is there another small fish one would recommend for this set up. Thanks!

 

Gobies, firefish, jawfish, and some varieties of cardinals are good options. Here's a link to a bunch of fish that can be housed in 20 gallons: Nano Fish

 

What gobies would be recommended, I am leaning towards one of them.

 

I have a pair of clowns, and a shark nose cleaner goby in my 20g. The clowns do great, and the goby is doing well also. As for a cuc ( clean up crew) a few Astraea Snails should be fine, 3 or 4. Your Brittle Star should take care of the substrate (if any). If you're looking to get into corals start with softies (mushrooms, zoanthids, xenia, etc.). Avoid dragonettes or mandarins because they often have to be target fed. Good luck!

 

Sorry, these are goby-like fish.

 

I am going to pass on the corals cause of the price. Thanks for the info on your goby and cuc.

 

Look on here for people around where you live. People practically give away those corals because they grow so fast!