- Compatible with aquarium walls up to 8mm thick, this water refill system features two settings for 5mm and 6mm thicknesses, ensuring versatility for various aquarium types. - The differential pressure pipe has a unique design with a slanted opening at the water end. It includes one long tube and one short tube, with the short tube indicating the maximum water level. As soon as the short tube is fully submerged, the system begins to refill. Once the short tube is out of the water, it stops replenishing, preventing overflow. - The adjustable hose length can be manually cut to fit your specific needs, allowing for customized water levels in your aquarium. - This product requires a water refill bottle, compatible with standard domestic soda bottles, making it easy to source and replace. - Equipped with a built-in noise reduction device, this system minimizes operational noise for a quieter aquarium environment. Use scenarios: 1. Ideal for maintaining consistent water levels in freshwater or saltwater aquariums, reducing the need for manual refills. 2. Perfect for aquarists who want to automate their water replenishment process while ensuring proper water levels for the health of aquatic life. 3. A practical solution for busy aquarium owners, allowing for peace of mind knowing that water levels are automatically managed without constant monitoring. Experience a reliable, quiet, and easy-to-use water refill system that keeps your aquarium thriving without the hassle.