Neat article there phytomike. I am not much for understanding chemistry but two things stick out to me when reading how it works:

1) It works by breaking down. My common sense tells me that if it is doing this, it would just be recycling back into nutrients that will be used again by the algae.

2) The other thing I noticed was the mention of hydrogen peroxide. This was recently discussed in a thread and to how it affects algae. It's interesting that the barley does this.