No one of the scientific articles about nano bubbles has describe such a method like yours in order to create nano-bubbles. Your last link state.
If your simple methode works - I think it should be a sensation in the academic world - so for your own sake - prove that you can create nanobubbles with help of a wodden air stone and a simple aquarium pump.
I do not doubt that bubbling in the DT help the degassing, I do not doubt that you sometimes can flocculate organic matter with the method – but all of these things can be explained by well-known principles and you do not need nano-bubbles in order to explain this. After reading a little about real nano-bubbles properties I start thinking that – maybe it is our luck that the bubble method does not create real nano-bubbles!
This part of your link is also interesting. I have not access to the original article but it looks like nano-bubbles not works well in saltwater
Link to the original article.
I'm no chemist, but it seems that nano-bubbles are not particularly stable in saltwater. The scientist tested 80 nM (NaCl) saltwater and I think that you normally calculate that sea water contain between 500 and 600 nM NaCl
Sincerely Lasse
If saltwater ions have an adverse effect on bubbles, why is the surface tension (hence bubble surface tension) stronger than that of freshwater?
Debunking this will be debunking the premise of a protein skimmer. Ahhh... that's the ticket. The saltwater that's being micro-nanobubbled is not pure but rather littered with dissolved organics and proteins and protein particulates.
Nor does the article mention at which specific gravity they were testing their observation (theoretical speculation) on. Maybe that's the key, a threshold sg and organics in the water.