The CPDs are actually in my 20L now, but I was debating on CRS or some chili rasboras.
The tank is already swamped with snails. I don't know why they multiplied so fast but I must have 50 of them already. I don't mind them in bigger tanks but in a little one, they are big enough to be distracting.
Maybe I'll do a few A. helenas and then get a few of the chilis if I can find them local. Frank's is a tad expensive on shipping so I'll be at the mercy of the LFS. Worst case scenario, I have some cherries that wouldn't mind that tank. We will see.