Electric Aquarium Gravel Cleaner, Yosoo Aquarium Gravel Cleaners Battery Electric Powered Fish Tank Washer Siphon Vacuum Water Changer Pump Filter (Battery Not included)

How to use:
Press the on/off button on the top, the water in aquarium will be pumped out automatically through a hose for changing water.

Features:
Aquarium Vacuum Cleaner + Water Siphon
Easy to install and use.
Telescopically adjustable height for large and small aquariums
Adjustable height
Maximum water depth 52 cm
Hose & Filter bag included.Syphon Pipe supplied
Flow rate 520 litres per hour
Can remove the dirt from the bottom of your aquarium.
Supplied with two suction pipe sizes
It is suitable for both big and small aquariums.
Also be used as a water siphon for water changes
Empty your aquarium when you connect a hose to outlet.
Material: High Quality ABS Plastic and Electronic Components.
Length: 40-95cm(adjustable)
Tank size: for tank with height of less than 1 meter (3.28 feet) while water level is between 20cm (7.87 inch) to 75cm(29.53 inch)
Power Requirement: 2 x Battery (C/LR14, not included for safe shipement) or DC 3.3v adaptor( adaptor not included )

Package Include:
1X Aquarium Gravel Fish Tank Vacuum Syphon Cleaner Pump

Note:
The suction power will be bigger If you plug DC 3.3V adaptor to operate the item
The product service life will be longer if you use battery

How does the item start to work when the tank is small and the water line is low?
You could lean the item to let the start water line submerged by the tank water. Then you press the switch to let the item pump water. When the water chamber is full of water, the water cycle begins to work, at this point, you could put the item straight. The item could pump water out as long as the water inlet is submerged under the surface of tank water