What should I stock my 10 gallon with?

I have a empty 10 gallon just sitting on my porch looking at me, I already have a 20 gallon setup with fish in it but I would like to have my 10 gallon as well so what do you think I should stock it with? I'd rather not have shrimp as I just don't have good luck with them and I have an allergy to slime snails produce so I would rather not have those.

Past that as long as it's fresh water I'm up for anything As long as it's not as fragile as a feather.