Bender,
How deep was your output originally ? and do you know how much head pressure you had behind the water from the well ?
Just thinking out loud here. It might be necessary to initially pump the well water into a small holding tank ( maybe 50-100 gallons ) and then use a small booster pump with a higher head pressure to push the water and air to the bottom.
I would think starting a system like this and disturbing the lower water levels would have the same effect as adding a diffuser would. Perhaps short sessions initially or following the startup procedure for aeration would eliminate the YP die off ?
Water output was somewhere around 20'. The pump definitely was undersized for this and could not produce enough pressure.
I like your stock tank idea, but if you are going to pump water you might as well pump up from the bottom. You can then spray into the stock tank and gravity drain back to the bottom of the pond. You could add well water at the stock tank using sweeper nozzles (like Condello did in his pond) to oxygenate and cool the water. You also might be able to use earth tubes to ensure the air around the tank is not too warm.
