wavebox

Do Tunze waveboxes necessarily create a "breathing noise" as the box fills and empties? Is there still water/air noise at the lower wave settings? I'm talking about this kind of noise: Thanks a lot!

I have 2 customized wavebox for sale, used about 2 years. One recently had pump motor replaced by warranty. These produced a solid 1.5" wave in my 300G reef. I suggest buying both wavebox since they are molded to look best that way. They are coated with great stuff foam, sand, and live rock...