I know, I'd love to get bigger, but I'm broke and keep finding really cheap half-gallon things when I get the urge to plant stuff. :/
Microcrabs sound pretty cool though, I might try them once my plants grow in a bit
a pair of orange shrimp.
a pair of chocolate shrimp
a pair of blue velvet shrimp
a pair of fire yellow shrimp
maybe a sulawesi snail or something.
opae ula shrimp using brackish water (if you do this make sure you do top offs every day or whenever needed)