Gee, thanks for the non-response.
Since I have more than one biology-related degree, and have been aware for decades that plankton contribute a very substantial portion of atmospheric oxygen, I'm not sure who you are addressing, or what the general "plankton awareness level" has to do with my request for links.
"Plankton farming" currently produces only 12 hits on Google, so it appears that your idea has not quite caught fire yet.
It might be a great plan, but it sounds like something you need to promote yourself.
Because I don't buy that CO2 levels are a 'problem' except for the ones that believe in it are going to attempt to destroy our lives.