Dwarf fish such as Guppies and Danios, Corydora catfish, pigmy suckermouths, groups of barbs or tetras Plecostomus catfish, or merely plecos for brief, are a big team of South American Catfish that hang out on the bottom of lakes and rivers and graze on rocks and driftwood. Plecos are fantastic https://pearlaquatics.my/product-category/tester/