External Aquarium water pumps are more powerful, allowing the hobbyists to run multiple configurations from one pump. External water pumps are not for submersible use in water. See our large selection of quality external water pumps. We carry ReeFlo, Poseidon, Little Giant, Coralife, Iwaki, Dolphin and Gen X aquarium water pumps. If you don't see what you're looking for on our web store, contact us, we can get it for you at the best possible price. If you are in the Atlanta Georgia area of the U.S. and are in need of a professional plumber, you'll find the best service and prices at Atlanta Plumbing.