Reef Central had a tank of the month, 8 years ago, that used intermittent air injection.
Pic and diagram of the setup is about half way down the page.
http://reefkeeping.com/issues/2008-04/totm/index.php
I'm not crazy about the idea if you run air injection 24/7, intermittent probably wouldn't hurt anything as long as you had strong enough flow otherwise to dislodge the bubbles from the corals and live rock.
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