Half Off Ponds 3/8" Weighted Black Vinyl Tubing Subsurface aeration is the most effective way to add oxygen and create bottom-to-top circulation in ponds & lakes. Aeration systems are a safe way to help control algae without introducing harmful chemicals into your pond or fish. Half Off Ponds 0. 375" Inner Diameter / 0. 728" Outer Diameter Weighted Black Vinyl Tubing is self-sinking and hugs the bottom contours of your water feature, helping keep the air on the bottom, and the hose out of sight. The strength of this weighted tubing allows it to be buried beneath the ground surface between your aeration pump/compressor and your water feature. This superior tubing is engineered to prevent cracking, splitting, kinking and is backed by a 3-Year Manufacturer's Warranty.
