?Quick Installation & Disassembly?Without any tools, it can be assembled and disassembled freely to meet your different needs. When using, hold the handle and press, the water will be automatically sucked into the hose, and flow out through the hose, quickly clean.(The fish tank is less than 1 meter, suitable for water level 25-75cm) Please read the instructions carefully before use. ?Adjust Flow & IP68 waterproof?Aquarium gravel cleaner with 3 clean head, clean every corner of the fish tank. The rotary button can adjust the water flow, equipped with filter bag cleaning and siphon water change. Include:1* main body, 1*DC 12V adapter, 1*retaining clip, 2*sand wash head, 1*clean head, 1*150cm hose, 1*filter bag, 1*instruction manual. ?Upgrade Electric Water Changer 18W?Equipped with a powerful 18W pump motor, DC 12V works without making noise. And the suction is strong to help you quickly change water or suck out fish manure and food residues in the sand. Our motor mounted in the end position and you can use it to clean low water tanks. (The sand wash start must be above 15cm). ?Adjustable Extension Tube Design?Adjustable telescopic tube can be lengthened from 61CM to 92CM, suitable for aquariums of different sizes, don't worry about the fish tank being too high or the hand not enough long. The maximum flow rate of the automatic water changer is up to 530L/H, It is perfect for different types of aquariums from 35-700 L. ?6 IN 1 Multifunctional?bedee fish tank gravel cleaner can ?wash sand, ?suck manure, ?brush tank, ?shovel sand, ?filter water, ?change water. High quality plastic material, will not harm the fish, make you to clean fish tank more time-saving and efficient than manual siphon. External independent switch, and switch is not waterproof, please keep it away from water.