That being said, what is a possible solution??
At this juncture, I haven't a clue? I am not sure how all those chemicals reacted or if they reacted with one another? Did you create aluminum sulfate? Did that, or some other component, react with the lime in the rip rap?
I would still try to determine if photosynthesis is at work by testing at 3am and 3pm. It's easier to throw darts at one bullseye.
