Dwarf fish including Guppies and Danios, Corydora catfish, pigmy suckermouths, teams of barbs or tetras Plecostomus catfish, or maybe plecos for short, are a big group of South American Catfish that hang out on The underside of lakes and rivers and graze on rocks and driftwood. Plecos are great algae https://pearlaquatics.my/key-tips-to-keep-your-sobo-aquarium-healthy/