Even a small pleco such as a bristlenose or rubber lip would quickly pollute 10 gallons of water. Even if they would fit when mature the maintenance would be a nightmare and leaving a water change even one day later than normal could potentially be catastrophic.
Tudiapaktam, please read the question and give a little bit more info than "pleco". There are countless kinds of pleco ranging from a few feet in length to a couple of inches.