The MaxFlow pumps are fully submersible pumps. They are powerful, yet quiet, and designed for very low energy consumption. Suitable for both fresh and saltwater aquarium use and is an excellent choice for water gardens or ponds. This versatile pump offers flow control and comes equipped with numerous multi-purpose fittings for use as a powerhead or circulation pump. The MaxFlow SWP-230 is capable of moving 95 gallons per hour. The MaxFlow SWP-2600 is capable of moving 740 gallons per hour. The MaxFlow SWP-3300 is capable of moving 977 gallons per hour.