This submersible water pump is excellent for aquariums, hydroponic systems, fish tanks, water gardens and a variety of other applications. Add more circulation to your aquarium and give your lovely fish a near-natural environment.   Features: Max. Flow Rate: 1800L/H, high efficiency and performance.  Equipped with a 11mm nozzle, threaded fittings make it more stable.  The reliable and durable motor does not produce much noise(about 35dB).  Made of high-grade material, which is wear-resisting, non-toxic, safe to use.  The submersible pump is perfect for fish tanks, aquarium, fountain, hydroponic systems, cooling and circulation systems, etc.   Specifications: Plug Type: EU;  Power: 25W;  Voltage: AC220-240V, 50Hz;  Noise: 35dB;  Waterproof Grade: IPX8;  Max. Flow Rate: 1800L/H;  H-Max.(Lift Height): 2m/6.56ft;  Cable Length: Approx. 145cm / 4.76ft;  Water Outlet Diameter: 11mm/0.43in;  Pump Size: 105 * 80 * 95mm / 4.13 * 3.15 * 3.74in;  Item Weight: Aprrox. 399g / 14.07oz;  Package Weight: Aprrox. 452g / 15.96oz;  Package Size: Aprrox. 12.5 * 12 * 10.5cm / 4.92 * 4.72 * 4.13in;   Package List: 1 * Water Pump;  1 * Nozzle;   Note: 1. Please check the voltage and power of the pump power before power on, insufficient power and insufficient frequency would affect the flow rate;  2. Please cut off the power before you install/put in/take away the pump from the water; otherwise, the pump can't outlet water due to the air in it.  3. Used in the water without particles and impurities, NOT for viscous and acid-base liquids.  4. DO NOT dry burn the pump, otherwise it would be damaged.  5. Switch on-off the power repeatedly for several times to eliminate the air in the pump impeller and the pipe.  6. Please clean it regularly in case of debris blockage, the pump would make noises or even make the motor short circuit if blocked by debris;