I loved my otos. Not only did they eat algae in the tank, they used to float upside down at the surface of the water, sucking a thin bacterial film from the surface of the water. They never bothered any of my fish and were quite peaceful.
The only problem was that once my tank ran out of algae, they didn't transition to eating veggies or algae tablets. So the poor things ended up starving to death.
The only problem was that once my tank ran out of algae, they didn't transition to eating veggies or algae tablets. So the poor things ended up starving to death.

