20 gallon stocking

[imnewplshelp]

I have a 15 cube currently with one clownfish. Planning to quarantine more fish soon but I’m wanting to upgrade to a 20 at some point. I’m looking for suggestions for interesting fish that I could put in there. I know I want another clownfish (the other one I had got stuck in the overflow somehow) but I was thinking I would add a 3rd small fish for now and maybe a royal gramma in the 20 eventually? Or should I just stick to two clowns and wait for the tank upgrade to potentially get something else? They all need to be reef safe also. Thank you!
PS I already have a shrimp goby pair planned for a different setup in the future.

 

[Euphyllia97]

You can go for a second clown and add a Yellow clown goby. They have so much personality, add color and almost no bioload. Would skip the royal gramma even if you upgrade to a 20 gallon. Clowns are territorial and royal gramma’s can be nasty aswell.