Product Introduction

This is a 3D-printed aquarium outlet replacement designed specifically for 18 mm outer-diameter flexible tubing. It features a unique duckbill (flared) outlet design that disperses the water flow from the filter pump into a broad, gentle water curtain, effectively increasing the contact area between water and air. This not only reduces water impact and improves circulation but also significantly boosts dissolved oxygen levels in the water. It’s a practical upgrade accessory for enhancing the effluent performance of small aquarium filtration systems.

Design Highlights

1. Duckbill Oxygenation Structure: The flattened flared nozzle at the outlet breaks up the concentrated water stream into a sheet-like curtain, entraining more air bubbles as it falls onto the water surface to achieve efficient oxygenation—especially suitable for high-oxygen-demand environments.

2. Precise Interface Fit: The cylindrical inlet has an inner diameter precisely matched to 18 mm (approximately 16/22 specification) outer-diameter flexible tubing, ensuring a tight connection that prevents dislodgement and leakage.

3. Integrated Curved Flow Channel: The optimized bend angle and streamlined inner walls guide the water flow either diagonally downward or horizontally, creating surface ripples while avoiding direct jets that could disturb tank decor or harm aquatic life.

4. 3D Printing Customization Advantages: By adjusting print parameters, different surface textures can be achieved; the structure is robust, integrally molded with no seams, making it easy to clean and allowing for personalized size adjustments.

Technical Specifications

• Core Specification: Compatible with standard flexible tubing having an outer diameter of 18 mm (inner diameter approximately 12 mm).

• Primary Materials: PLA / PETG / ABS (3D printing materials; PETG is recommended for long-term underwater use).

• Structural Features: An integrated L-shaped bent pipe with a flat duckbill outlet at the end.

• Main Functions: Water dispersion, oxygenation, energy dissipation, and flow direction modification.

Application Scenarios

1. Oxygenation for Small Aquariums/Shrimp Tanks: Provides efficient dissolved oxygen supplementation to small water bodies that lack dedicated oxygenation equipment by utilizing filtered effluent.

2. Moderating Filter Flow: Used when the pump flow rate is too high, transforming strong water jets into gentle streams—ideal for keeping small fish, shrimp, or fry.

3. Upstream Filtration/Wall-Mounted Filtration Retrofit: Directly replaces the original round outlet with this duckbill outlet featuring oxygenation functionality, thereby enhancing filtration performance.

4. DIY Filtration Systems: Serves as the effluent outlet for self-assembled external filter barrels, small turnover boxes, and other filtration setups, optimizing the effluent pattern.