Which fish eat feces? I don't know of any that do. Shrimp don't, at least none of mine do. Gravel vacs don't work very well IME, especially not in smaller tanks. You can get small inexpensive siphons that work very well. The shrimp will usually run away when they see it coming. Just check the water before you dump it out and if you find any that have gone for a ride, pop them back into the tank.
Cherry barbs are fine in small planted tanks IME. I wouldn't recommend them or really any of the others mentioned here in a 5g hex or other tall tank, but in a rectangular tank, they do quite well.
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Tina
Puffers:
Auriglobus silus x2
Colomesus asellus x1
Tetraodon travancoricus x1
Tetraodon biocellatus x2
Tetraodon nigroviridis x1
Tetraodon baileyi x2
Tetraodon lineatus x1
Tetraodon palembangensis x1
The greatness of a nation and its moral progress can be judged by the way in which its animals are treated. - Mohandas Gandhi
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