You would probably have more problems between the two catfish rahter then the bass but you can try it. IMO, don't get a pleco if all you want it to do is clean glass, they aren't worht it...at least not all the time and they do produce a lot of waste.
i had my pleco in my feeder tank before. no heater in it, and i think the water was around 60-70~. he was fine for a few weeks, and i gave him away,and i have him back again.