"Greetings Irvin. For some reason I did not see your request till now. That particular presentation was not recorded. However here is a TEDx Talk I did recently on the subject that may be of interest.
Link to talk: http://bit.ly/1wvnEHO"
"Algae is one of the major problems I have with my system. I use an in-ground Choi pond that is open to the sun and sunlight. In the summer I can't see more than a few inches below the surface because of the algae. Algae coats…"
"I might be interested in buying some too, if you get the shipping part figured out. :) I will let you know in a couple months when I get the system built out. Maybe this would help:
"Great looking build Rob! Have you used any of the photosynthesis plus in a traditional aquaponic system? Any problems with the fish?
That's a really cool trial you're doing with that fish-less system. Had you had a chance to do water or…"
"I use expanded shale (hadite) in my beds. There is a place about 20 minutes from where I live that makes the stuff (no middle man). My grow beds are 16 cubic feet (4'X4'X1') and it cost me about $35 to fill one, using my truck to haul…"