I would not have bet an aquarium aerator was so trivial... The transformer is only a big U-shaped electromagnet which moves two levers to and fro (we are talking AC current of course). Each lever acts on a respective diaphragm to feed air to the tube. I guess most of the price I paid went into patents (!) and into making it quiet (lots of rubber pads and suspension). Well, I did not try it yet (110V vs 240) ...
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2016-03-07
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