Aeration for a winter pond

Its time to think about how the goldfish and trout are going to survive the winter. Our trout and most of our goldfish winter outside in a large dugout, which we aerate with a vertex compressor system. The compressor provides air to four 9" air diffuser disks which produce very fine streams of air bubbles into the water. The air disks are connected to the compressor on shore by means of a weighted bottom line hose. The force of the air flow from these air disks will keep a hole open in the ice, even in our cold -20 to -30 temperatures.