IIUC, the smaller a bubble is, the longer it lasts. This may have something to do with their calculated result. If so, this sounds pretty good.
Only thing is, I think this needs a bit more research:
What happens to fish, etc. who swim through these bubbles?
Does this change the rate at which gasses diffuse through water?
Does it affect the rate of evaporation? If so, what effect does that have?
Most of these can probably be answered fairly easily, and maybe they already have been. If not, they should be considered.