What other types of tropical fish can be successfully kept with discus?
Cardinal tetras are probably the best companion fish for your discus aquarium. First of all, a group of cardinal tetras are simply beautiful tropical fish. They are fun to watch. Cardinal tetras are also very suitable with the warm, acidic water that discus like. Finally, cardinal tetras are dither fish. Dither fish can have a strong calming affect on more timid, larger fish like discus. The small dither fish swim back and forth in the aquarium, out in the open. The discus notice that these small fish seem secure in their environment. That gives them a signal that everything is safe in their enclosed environment and allows them to come out into the open without any fear. If you ever have shy, skittish discus that always seem to hide, you might want to add a school of cardinal tetras to your aquarium. Corydoras catfish are another good fish to add to a discus tank. Adding a few corydoras catfish to the tank will help with clean up maintenance. They will scamper around the aquarium looki
