Alk, Flow, Growth article on Advanced Aquarist

Can anyone give a reference of what those flow speeds be like in our aquarium ? Such as blasting coral directly, frag plug almost blowing off frag rack, polyps hanging on for dear life?

"We should note that the water velocities used in these experiments (1.9 and 3.9 inches per second) are well below those water velocities measured on a natural reef (Kailua-Kona, Big Island of Hawaii.) Even on a calm day, water velocities of 6-8 inches per second are the norm. To put this in perspective, this is 0.34 to 0.45 mile per hour. During storm or conditions of high surge, water velocity can certainly be measured in feet per second and it is too dangerous to even enter the water."
 

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