TetraPond Pond Tubing, 1-Inch Diameter, 20-Feet Length POND TUBING: Use to connect water pumps, bio-filters, UV clarifiers, waterfall filters and other components in your pond or water feature. DURABLE CONSTRUCTION: Will not crimp or collapse. BURY TO CONCEAL DIMENSIONS: 1 inch diameter, 20 feet long. TETRA PRODUCT: You can trust your pond to Tetra products.