Just thought I would share a couple of pics of a pretty rare Hypoptopoma. They have the common name giant Oto but are not a member of any Oto species. They are Hypoptopoma gulare. One of the best algae eaters I have ever owned. I keep them in my 90 gal and they have been in there for going on 5 yrs now and not once have I ever seen any trace of diatoms or any other algae in this tank.