I have read that and will try to stay minimalistic when adding the hay. However, I do not have any aquatic plants, or have seen any type of algae this spring yet. Which leads me to believe that nutrients may not be a bad thing in my pond. Of course, abundance can be detrimental.
I have teettered back and forth on the Alum game, but now I am forced to make the "cheapest" decision possible. That's why I am at Hay.