You can't get 5/6 angels in a 55 gallon. That amount requires at least a 100 gallon. For the algae eater, I'd choose one or the other. If you go with ottos, 6-8 of them is minimum. 10 is a good number. If you go with a pleco, an acistrus, gold nugget pleco and clown pleco are good choices. Be...