I do have a common pleco that is in a way bigger tank, (one of the reasons
I don't have much room in my bedroom for tanks) but the pleco I am talking about right now is much, much smaller, lighter colored, and shy. She also produces way less amonia and waste compared to my other pleco and even my goldfish. She's about one inch long and was about half an inch when I got her. I would think she was a baby, but I've had her for a long time now, and my other pleco grew faster. I know she was a different species, but I forgot what one. I'll take some photos and post them here.