https://video.aliexpress-media.com/play/u/ae_sg_item/2208390370021/p/1/e/6/t/10301/310485620017.mp4,Feature:,Innovative auto siphon pump (Semi-automatic Water Changer ), quick & easy,On & Off flow control wire,Integrated gravel / fish strainer,This tool is easy to install and use,And you can use this tool freely for its high safety performance,With this tool, you can remove the dirt from the bottom of your aquarium. Supplied with long suction pipe, it is suitable for both large and small aquariums,Tube Length: 143cm,170cm,Material: Plastic,?User Instruction:,Put the Instant Gravel Cleaner into the fish bowl instantly,Put the other end of the tube into a bucket, then press the spring softly by your hands,Please reduce the water inlet height, thus you can remove the dirt from the bottom of your aquarium,Package Content: 1 x Aquarium Cleaner Vacuum Pump for Fish Tank,Precautions,1. Put the water inlet into the aquarium,2. Do not drain the water completely during use,Place the outlet water below the fish tank,4. Keep pressing the blue water-absorbent ball, and stop pressing after the water flow is formed, then the water can be changed and cleaned.,5. Because the filter has a pore structure, too fine sand will be sucked out. Tighten the outlet pipe to control the water flow. Avoid this kind of situation.