WuyouChy Aquarium ATO System Fish Tank Water Level Controller Automatic Top Off Water Filler

When you are on a business trip or traveling, use our water compensator to avoid water shortage in your fish tank, aquarium tank, tortoise tank, or other tanks. To use it, you just need an ordinary 1-2L water bottle. Screw the compensator to the bottle, then stick it to the tank. No wiring or power supply required. When the water level drops to reveal the shorter tube, the water in the bottle automatically flows into the tank due to pressure difference. You can cut the tube into the length according to the water level you want. Each compensator comes with 3 replaceable slots, suitable for 4 kinds of tank thickness: 4mm, 6mm, 8mm, and 10mm. For other thickness, you need to prepare extra gasket. For large tank or long time leave, you can increase water supply by using multiple water compensators. Only 35 mm in length, width and height, little space required. Package includes: 1* Water Compensator, 3* Thickness Adjustment Slots, 1* Silicone Tube (Can be cut into 2), 1* Instructions, 1* Adapter. Note: An Evian 1L bottle will fit the threads well.