Should I do it? I have a 10 gallon tank housing 1 male and 2 female pea puffers. There isn't any noticeable aggression between the puffers, and there are no other tank mates. I have read mixed information on keeping otos with pea puffers, but it seems like a lot of people say pea puffers in general just ignore otos, but will bully pretty much any other fish. The reason I want to add otos is because I am getting some algae buildup on the hard surfaces. Yes, I know, the best algae cleaner is me, not a fish. And I do clean it, but would like a fish to eat algae in between cleanings. If I do add otos, how many should I get? I've never kept otos before so I don't really know much about them.