BOYU WF-2025 Hang-On Back Filter Features:
Water pumps and filtering media are all built-in structures. Adjustable water flow rate. Easy for a sembling and operation. Combination of mechanical, chemical, and biochemical filtering functions to ensure clean water. A specially designed water circulation system helps the diffusing of Co2 in the water and supplies enough oxygen for the tank.

Instructions for use:
Make sure the power supply is the same as indicated on the tag and then plugin. Forbid to run in a dry condition. The filter must be filled with water first and then connected to the power. The filter must be ganged to the two sides or the back of the tank. The inlet tube should be kept vertical and as close as possible to the water level. Turn the regulator knob at the bottom of the filter if otherwise, the water level of the tank should be kept higher than the position of the filter pump. Keep the socket out of reach of children. Do not use it while the liquid is damaged and do not touch the plug with wet hands. If the light falls into the water or gets wet, disconnect the plug first and then take it out of the water.