A center overflow is the ideal and when properly tuned for a single wave, you should not have much if any overflow noise. The wavebox itself does make some noise, it alternately fills and empties of water and this produces a breathing noise (darth vader).
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Roger Vitko
Tunze USA
"He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!"
Current Tank Info: 210 gallon planted tank with Altum Angelfish
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