I have a couple plecos that I had to move from my 50G to my con breeding tank because they where getting assaulted. I was actually more concerned for them in there though. I figured the cons would drive them crazy but have found it to be quite the opposite. they really don't care about the plecos. I have a goldspot and a peppermint ( no Idea there proper names) I have seen the plecos in a pot while the parents are laying down a fresh batch of eggs. at first I wondered if the pleco's would go after the eggs but the ignore them. for me I found it quite amazing that they don't even acknowledge each other.