I haven't found it necessary to supplament my homemade food, when I process it I make sure I liquify some of it to feed the inverts. If I were to add a food for my corals it would be live phyto-plankton, like DT's. I have read that after the DT's has gone out of date....it's still better than the marine snow. I seem to remember that Rob Toonan did an article on different plankton/phyto-plankton sources....
Planktonic Foods for Reef Aquaria: If you feed the tank, are these foods for you?" Marine Fish & Reef USA Annual 2002
Not sure if I've got this annual or not, if I do...I'll scan it and send it to ya.