Description: * Easy Operate Filtration. * Durable and easy maintenance. * Superior Quality. * Self priming capability (in case of power cut) Direction: * Fix filter at an ideal position on tank and make sure it is steadily fixed taught. Use adjustment knob at bottom to affix postion. * Fill up filter with water and cover the filter with the filter lid. * Plug in to powerpoint and turn filter on， water should start runing. * The adjustment knob on the cover can be used for flow rate/volume control. * When filter retards in the flow， the bio foam and carbon/filter wool catridge shuold be taken out for rinsing， change the filter mediums in every 3 months time. * Pristine filtering can be achieved as water flow through the bio-foam. Features: * Compact filter with capable bio-filtering result.  * Easy setup with flow rate adjustable. * Made with clear see through cover for easy supervision. * Long lasting and durable powerhead. * Fit for use for any medium sized aquarium. * Self priming capability (in case of power cut) if water level is at substantial level. Classical Crystal Hang-On 3 * Power  -  6W * Max Out Put  -  600-750 L/H * Recommended Tank  -  Up to 90cm