IME it seems like they take care of the green stuff and BBA pretty well when they're young, but they prefer fish food when they get bigger. Don't feed them enough and they'll start to eat your moss and more delicate plants.
Thanks guys! I just wanted to confirm my suspicion.
I don't find Otos being too good at eating diatom...i don't know why. I have a school of 6 of them in my 10g...and there are diatom all over. They seem to finish the algae wafer, though, over night. =)
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