Otos are community fish and do best in groups of at least three. They will not starve because they would need to be fed on algae wafers.OK, thanks. I'm not sure the frogs wil be able to catch the puffers as they have bad eyesight as it is, but its not impossible. OK, ill go with your idea, but only 2 otos, as i dont want them to starve without enough algea to eat in a small 10 gallon.
NEVER rely on just tank-grown algae to support algae eating catfish.