Orlushy Dc-4000 Silent Swirl Controllable Dc Aquarium Pump 25W 1050Gph-Marine Wavemaker Return Pump With Sine Wave Controller For Salt/Freshwater Coral Reef Fish Tank Sump Circulation

sine wave technology Ultra silent operation. Variable speed control with up to 20 different speed settingsoffering precise adjustment of water flow for optimum performance. Dc return pump modes:steady flow mode wave mode feed mode. NO Copper components parts Suitable for marine and fresh watersafe for any tank£¡ Low voltage safe£¬IC Electronic Detection Motor protection if rotor is blocked. With wear-resistant ceramic shaft longer operation life.