The discus are to little to really Identify. The Pleco looks like a leopard sailfin to me. I would watch him closely around the discus . I had one that killed 2 oscars that where 9 inches. Plecos don't really belong with discus
Feed your Filtration
Give it to Porc Chop he'll eat anything!!!!!
"This is my tank and these other fish just live in it"
^ Quoted from Porc Chop^
What size is the tank you got some pretty beasty fish in there, balas are pretty zippy for discus and I believe that pleco get to 10 inches I may be wrong though. They all look happy at the moment though, that knife fish freaks me out the way it looks lol I mite do some research on them
Well got some good news, pleco doesn't really bother my discus and I think he's stunted cause he hasn't grown in a few months now. Still love him and he dies a good cleaning job. Trying to get rid of the balas they are a bit to zippy but thanks for positive comments