- This product requires a compatible water refill bottle; it is designed to fit standard domestic coke bottles. - Compatibility: Suitable for aquarium walls with a thickness of up to 8mm. It features two settings for 5mm or 6mm thick walls, allowing for easy adjustment. - Functionality: The product includes a differential pressure cut-off design with a sloped intake. The shorter hose indicates the maximum water level; once fully submerged, it ceases to fill, preventing overflow. - Noise Reduction: Equipped with a built-in noise reduction device to minimize operational sound. Please note that it may not be completely silent. - Adjustable Hose: The hose length can be manually cut to customize the water level to your specific needs. Use Cases: 1. Ideal for maintaining optimal water levels in home aquariums, ensuring a healthy environment for fish and plants. 2. Perfect for automated water changes in freshwater or saltwater tanks, simplifying maintenance tasks. 3. Useful in creating a consistent water flow for decorative aquascapes, enhancing both aesthetics and functionality. This product ensures reliability and ease of use for aquarium enthusiasts, making it a practical addition to your setup.