- Installation Guidance: Follow the indicated water level line during installation. Maintaining the correct water level is crucial—too low can increase noise, while too high risks backflow during power outages. - Compatibility and Dimensions: This aquarium water outlet has an inner diameter of 20mm, designed for aquariums with outlet diameters of 20mm or 25mm. It's perfect for bottom filtration, back filtration, or external circulation tanks. - Gentle Water Flow: Specifically designed for aquariums with substrate sand, this outlet creates a gentle water flow that avoids disturbing small fish and prevents sand displacement, ensuring a stable environment. - Enhanced Oxygenation: This connector promotes effective aeration by keeping bubbles circulating within the water column. This process enhances oxygen dissolution, improving overall water quality for your aquatic life. Use Scenarios: 1. Ideal for aquarists using fine substrate sand, ensuring a tranquil habitat for delicate species. 2. Perfect for maintaining optimal water levels in tanks with external circulation systems, preventing noise and backflow issues. 3. Beneficial for environments requiring enhanced oxygenation, supporting healthier fish and plant life. Choose this aquarium water outlet for its reliable performance and compatibility, ensuring a tranquil and healthy aquatic environment.