ReeFlo pumps are one of the best high flow/high pressure pumps in the aquarium industry. They are affordable, low wattage and quiet pumps. ReeFlo is unique in that they have created hybrid pumps which can be switched from one flow rate to a significantly different flow rate. For example, the ReeFlo Snapper/Dart Hybrid can be used as 4300 GPH flow rate pump or a 2600 GPH flow rate pump. The ReeFlo Barracuda/Hammerhead Hybrid can be used as a 6000 GPH flow rate pump or a 4590 GPH flow rate pump. Each of these models come with a kit to switch out the pump. ReeFlo also provides top notch customer service. We have, along with our customers, personally found ReeFlo to be extremely helpful with questions and troubleshooting.