Chuck,
My APF600 is virtually silent. My setup will not allow me to feed the skimmer from the overflows, so I use an Eheim to feed it. The Eheim pump that feeds the skimmer is much louder than the Aquabee that makes the bubbles. I don't regret shelling out high dollars for high performance; I regret shelling out a few bucks for junk (all made in Taiwan or China) with questionable performance.
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I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them. -Thomas Jefferson
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