【3 in 1 Function】: ① Dirt Suction. Gravel Vacuum for Aquarium equipped with a duckbill suction inlet accessory, and it is easy to suck the feces away. ② Sand Washing. Aquarium siphon with 3D Filter Basket Net, protect your love fish and small gravel from suck out of the aquarium. ③ Water Changing. Built-in dual airbags, atmospheric cavity, good resilience, effortless operation. 【Working Principle】: hygger's unique patented design --- equipped with a handle type manual press, which has more operating space and saves labor and brings convenience, by testing the fastest speed is to press 7 times. Sand Washer has 2 thickened airbags inside, which can pump water quickly. And using PP ABS materials, resistance to extrusion, do not worry about airbag damage and leakage, can be used for a long time. 【Easy to Use】: Push the siphon switch of the aquarium siphon vacuum cleaner several times, and make sure that the inlet tube part is full of water, and then observe the outlet hose. After the water continuously flows out, you can stop push and observe whether it will automatically. If not, continue to operate until the water will flow out quickly and automatically. The sand can move up and down in the extension tube to remove debris from your aquarium.

✔️ Time Saver: Hygger Bucket-Free Water Change Kit makes routine aquarium maintenance work a breeze, saving lots of time and energy on cleaning the mess caused by carrying bucket back and forth, easy to assemble and use ✔️ No Bucket, Auto Siphon: Simply attach to faucet, then turn on the tap, water will automatically start to flow out of the tank through gravel tube. By using the pressure of clear water from faucet to siphon waste water and debris out of aquarium. (PS: FAUCET IS NOT INCLUDED) ✔️ Draining, Filling & Gravel Cleaning: this fish tank siphon pump enables to draining and cleaning gravel at the same time as long as filling aquarium. Just move the gravel tube in a up and down motion to vacuum out debris from gravel. (NOTE: only with strong water flow can the gravel cleaning be fulfilled, agitate the gravel to suck out debris)