Sure, bubbles will work as you propose. Waste water treatment uses the exact method in aeration tanks. However, I wouldn't be interested in making my entire tank into a skimmer. I have a skimmer that performs that function already. Most hobbyists go insane now with any microbubbles in the tank, adding them on purpose isn't going to sell well.
Also, cost vs return is probably very high. I can't see a huge benefit to this over a high end skimmer. Salt creep would be an issue. I have enough of that now with surface agitation.
I just don't see this becoming mainstream for hobbyist tanks. It's just not something I would even consider.
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Brad
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