The Plecostomus is often known as the “janitor fish” thanks to its sucker-like ... The clown pleco is one of the most popular small catfish for aquariums — but while they’re chosen for ...

These fish can live comfortably in 30-gallon tanks. Be careful not to confuse them with the common pleco, which is around three inches as a baby but will quickly outgrow a small tank. 2.