Man, I wish I had that much algae...my otos do a great job on what I do get, but there's still not enough for them! Luckily they've finally started eating the zucchini I've offered...might have to leave my lights on longer!
Otos should be kept in groups of 3 or more. I currently have two because one died and I can't find any more good ones. Hoping to add at least two more to my tank eventually once I can find some!