[AGA Member] First post: tank oxygenation with power heads

[Mike Wickham <mewickham@compuserve.com>]

 >> Should I lower the pump below the water surface a little more? I was
 >> reading about the increased head increasing the pumps output or
 >> something (I seem to remember something about this from my Hydro
 >> Engineering lectures too).

It's entirely up to you. The main thing is not to raise it so high out of
the water that the impeller risks running dry or the motor risks
overheating and deforming. I would normally set the filter so that it's
just below the water line.

Mike Wickham

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