Thanks to Slade, reef diver and fresh2o,
Finally installed the two new aquaclear 70 filters in my 55 gallon and they are significantly quieter than the Aqueon quietflows and the penguins I tried before. Took three tries but finally happy, and from what I've read they much better quality too. Thanks for the advice! My husband is much happier, the aquarium is right next to his office.
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