Acrylic U-Shape CO2 Diffuser Elbow Tube for Aquariums

Crystal-Clear Acrylic CO2 Diffuser Tube for Aquariums

Upgrade your planted aquarium setup with this transparent acrylic elbow tube — designed to deliver carbon dioxide (CO2) and water flow with precision and style. The U-shaped hard tube keeps your tank looking neat and professional, blending seamlessly with any aquascape thanks to its crystal-clear construction.

Whether you're routing CO2 from a diffuser, managing water pump outflow, or refining your filtration line, this rigid acrylic tube provides a clean, stable solution that flexible tubing simply can't match.

Key Features

• Ultra-Clear Acrylic Material – Nearly invisible in the tank for a clean, minimalist look
• U-Shaped / Elbow Design – Ideal for CO2 diffusers, water pump inlets/outlets, and filter tubing connections
• Rigid Hard Tube Construction – Stays in place without kinking or collapsing
• Two Size Options (S & L) – Choose the tube diameter that matches your existing equipment
• Multiple Length Options – Available in 15 cm, 19 cm, 25 cm, and 32 cm lengths
• Smooth Inner Surface – Promotes consistent, unobstructed flow
• Easy to Position – Elbow and U-shape design provides flexible routing in tight spaces

Specifications

Size S

• 15 cm: 7 mm outer diameter × 5 mm inner diameter
• 19 cm: 7 mm outer diameter × 5 mm inner diameter
• 25 cm: 7 mm outer diameter × 5 mm inner diameter
• 32 cm: 7 mm outer diameter × 5 mm inner diameter

Size L

• 15 cm: 10 mm outer diameter × 8 mm inner diameter
• 19 cm: 10 mm outer diameter × 8 mm inner diameter
• 25 cm: 10 mm outer diameter × 8 mm inner diameter
• 32 cm: 10 mm outer diameter × 8 mm inner diameter

Note: 1 cm = 10 mm ≈ 0.39 inch

Package Includes

• 1 × Acrylic Elbow / U-Shape Hard Tube

Made in Mainland China.

For more information on healthy aquatic environments and responsible fishkeeping practices, visit the U.S. EPA WaterSense resource.

Frequently Asked Questions

Q: What is this acrylic aquarium tube used for?

A: This transparent acrylic elbow tube is designed for aquarium CO2 diffuser setups, water pump inlets and outlets, and filtration line routing. Its U-shaped and elbow design allows you to neatly direct tubing flow within your fish tank without kinking or bending issues common with flexible tubing.

Q: What size should I choose — S or L?

A: Size S features a 7 mm outer diameter and 5 mm inner diameter, suitable for standard CO2 tubing on smaller setups. Size L has a 10 mm outer diameter and 8 mm inner diameter, which fits larger water pump and filter connections. Match the inner diameter to your existing tubing or equipment outlet size for a secure, leak-free fit.

Q: Is the acrylic tube safe for use in a fish tank?

A: Yes. The tube is made from clear acrylic, a material widely used in aquarium applications. It is rigid, non-toxic, and will not leach harmful substances into the water when properly used in a freshwater or planted aquarium environment.

Q: Will this tube be visible inside my aquarium?

A: The crystal-clear transparency of the acrylic makes this tube nearly invisible inside the tank, helping you maintain a clean and natural-looking aquascape without unsightly hardware detracting from the display.