The Puffer Forum

So I got a cute little Indian Dwarf puffer/pea puffer a couple weeks ago. He is doing great with a school of ember tetras and a school of celestial danios/galaxy rasboras, but when I added some otos to the tank he started trying to chomp on their fins after a week or so. My otos were quickly relocated to another tank. My question is what algae eaters/bottom feeders would be a good idea? The tank feels incomplete.

How large is the tank? Dwarf puffers are happiest in groups of six or more and tend to leave their tank mates alone at that point.