I thin khalf the people replying to this post are confused about what you want (as am I).
Do you want bottom feeders/scavengers or algae eaters?
THe reason I ask is otos are'nt bottom feeders but you thought about getting some. Neither is the bamboo shrimp (its a filter feeder).
The cories are the only fish I saw recommended for bottom feeders that may work. Again it really depends on what you are looking for.
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