Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
I would ditto the suggestion for the dwarf Rasboras, any of several species.
Ember Tetras, but nothing larger.
Not Zebra Danios. Too active for that small a tank, and are large enough to eat baby shrimp.
I would go this way:
1) Plant the tank.
2) Add shrimp until they get established and are a breeding colony, and they know all the hiding places. You could add 1-2 Otocinclus at this time. Otos do not eat shrimp. They are pretty good algae eaters, cleaning the glass, and small enough to rest on the leaves and clean them.
3) Add a dozen of one species of the smallest fish.