ATO aquarium water level control system with adapter

When you're on a business trip or vacation, use our water compensator to prevent water shortages in your aquarium, fish tank, turtle tank, or other water feature. Better than a float valve, no wiring or power supply needed, and it takes up less space. Very easy to use, convenient, and fun. Simply screw the compensator onto the water bottle and attach it to the water tank. When the water level drops, revealing the shorter tube, the water in the bottle automatically flows into the tank due to the pressure difference. No screws required, so it won't damage your tank. Made of corrosion-resistant ABS material, it's also suitable for use in saltwater.