I have an 18 inch pleco, I believe it is just a standard run of the mill pleco, that seems to like sucking on my other fish. He especially likes my south american red tail(only about 11"). He ha sucked two rather large spots of skin off my red tail right down to white flesh.I don't want to get rid of him but it seems like I might have to. I just put them in my 265 gallon tank along with 5 gourami(around 8") , 3 oscars(6-10"), an african clown knife(15"), an albino clown knife(around 11"), a royal clown knife(around 9"), a marbled bullhead(around 9"), a red bellied pacu(around 16") and 4 other plecos ranging from 5-8" in size. Now he harrasses everyone that sits on the bottom, be it an oscar or a clown knife. Should I get rid of him???