Check the listing for details. AQUATOP PH-22 475 GPH MaxFlow Power Head. Condition: New. Listed at 22.99 USD. Aquatop's MaxFlow PH Series power heads deliver unparalleled water circulation for both freshwater and saltwater aquariums. These fully submersible units, constructed from high-strength ABS, offer enhanced aeration with an optional venturi air intake and regulator. With a flow rate of 475 Gal/Hr and 35-watt pumping power, they're ideal for powering under gravel filters and are compatible with Aquatop CAF-60 and CAF-180 Sponge Filters.Features:Fully Submersible for Optimal Aquarium FiltrationVersatile Use in Both Freshwater and Saltwater EnvironmentsEnsures Essential Water Movement for Reef AquariumsCrafted from High-Impact ABS for DurabilityUnique Design Ideal for Under-Gravel Filter SystemsSeamlessly Compatible with CAF-60 and CAF-180 Sponge FiltersFeatures Optional Air Intake and Regulator for Enhanced Water AerationTechnical SpecificationsVoltage: 110-120V / 60 HzPower: 35WHead Height: 5FtFlow Rate: 475 GPHCompatible CAF Model: CAF-60, and 180Recommended Tank Size: 250 GallonsTube Inner Diameter: 0.8"