Bender,
What specifically did you do other than not use a packed column? Which approach did you use?
Would there be any downside to pumping the well water directly into a 3/4 or 1 inch pipe to say maybe 1-2 ' off the bottom and then using a venturi type aeration directly into the pipe at the surface ?
I made a diy oxygen cone with a venturi and pumped well water to the bottom of my pond. I also had my aerator set to turn on when temps were below 70. Found out the venturi does not function well when the output is at the bottom of the pond, due to the pressure of the water above the output. After a few minutes the air intake on the venturi would start spitting water. I tried to compensate for this by dumping the water out closer to the surface, although I probably should have dumped it out on the rocks above the water for the venturi (and well pump) to really work well.
Temps at 6' stayed chilly but I was losing perch from what I suspect was gas build up and low DO from the well water.
