Weighted Aeration Tubing is the perfect small pond aeration solution. Constructed of thick-walled, puncture-resistant PVC, this self-sinking air supply tubing is non-kinking, flexible, lead-free, and fish-safe. It keeps the airline tubing at the bottom of the pond and improves the water feature’s appearance while reducing installation time. Comes in 3/8" x 25' and 100' lengths with 5.5 lb. and 22 lb. packaged weight respectively.