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Decription: Features: 1. Easily pick up fish excreta or dirt in the tank, electric style with the specially designed spiral suction head. 2. 3-IN-1: Clean gravel, changer water and waste removal. 3. Easy and quick completion of the daily water change of the fish tank, making the water change of the fish tank simple and interesting. 4. Electric style: ADJUSTABLE LENGTH - Simply adjust the cleaner rod length to suit your cleaning needs. 5. Manual style: Water inlet filter to prevent fish / sand from being sucked away. Electric style: filter mode. Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow minor deviation due to manual measurement. Specification: Product name: Electric Fish Tank Gravel Cleaner And Water Pumps Product size: Length: 57cm, maximum length 80cm, normal water level 40cm, maximum water level 52cm, maximum flow 520 l / h Power supply: 2 AA batteries(not included) Product name: Manual Fish Tank Gravel Cleaner And Water Pumps (with adjustment switch) Product size: about 2 meters (hard pipe length 53cm, hard pipe diameter 16mm) Product function: Easy and quick completion of the daily water change of the fish tank, making the water change of the fish tank simple and interesting. Instructions: 1. Place the suction port in the fish tank. 2. The water outlet is as shown below and placed below the water surface. 3. Keep pressing the blue suction ball and stop after the water flow is formed. Note: 1. The water level at the water outlet must be higher than the water level at the water inlet. 2. Too small sand will be sucked away, control the water flow when using Small to avoid. 3. Do not completely drain the water. Included: 1 x Fish Tank Gravel Cleaner And Water Pumps