I recently purchased a Jebao WP 60 and I'm impressed with the amount of water it moves. But it is noisy. (My wife calls it "Moaning Myrtle"). How noisy are the Eco-Tech and other high end wave makers? For reference, I'm running a one hundred gallon long, if that matters. I had two/three Hydor Koralias initially and one started to leak voltage. That's when I decided to try a wave maker. BTW, the Jebao plays chromatically between "D" and "F#" in reef mode. :strange: