Maintain proper water flow to your aquarium wet/dry filter overflow boxes. Rigid, plastic U-Tube is perfect as a replacement U-Tube or for custom aquarium plumbing projects. Large diameter U-Tube allows more water to pass through for efficient transportation of aquarium water. NEW 1 diameter Nano U-tube is perfect for smaller siphon overflow boxes. Available in 7-1/2 high x 1 diameter, 8 high x 1-1/4 diameter, and 8 high x 1-1/2 diameter.
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