thats my small tank, there is an Oscar and a little F1 jag, mom and dad are in the 145, 180 has 2 large tiger Oscars. along with a sun cat, and BKG, all of them get along with the Plecos, seems just because they really not know what to make of them, they will try and nip at them, but pleco really not care, they are a armored fish, and display no aggression, they will move away when nipped, then go about there bussness,.
I am not trying to sell you on pleco,s. just saying to not underestimate there worth.