Dwarf fish including Guppies and Danios, Corydora catfish, pigmy suckermouths, groups of barbs or tetras Plecostomus catfish, or simply plecos for short, are a substantial group of South American Catfish that cling out on the bottom of lakes and rivers and graze on rocks and driftwood. Plecos are excellent algae https://pearlaquatics.my/4-thing-to-judge-before-you-choose-aquarium-movers/