The 20 mm glass U-Tube allows hobbyists to easily run airline (preferably silicone) for CO2 or for general air supply over the rim of the aquarium without bending or cracking. Made of strong clear glass, which minimizes visibility of tubing.
• 20 mm size suitable for rimless aquariums and most standard aquarium rims – some standard rims are wider than 20 mm
• Ideal for aquarium airline or CO2 tubing
• Great for use with CO2 injection systems or bubblers
• An excellent addition to planted aquaria