I need a bottom dweller for my 5.5 gallon. I have to have some kind of one. Im thinking of getting either a trio of Oto's (would grow some algae in my uncles pond first of course) a group of some sort of shrimp or some dwarf corys. Can anyone suggest which is best for my current setup. Id order the shrimp online (already cleared it with mama) and id like a group of at least 6 shrimp if i got any. What are easy kinds to care for? Thanx in advance for all help given