"Tipping points" might make for an interesting discussion in pond management.
Example, what density (fish/acre) of GSH or Tilapia are needed to eliminate FA. When FA is completely eliminated, where does the nutrient load end up? Where does it get steered to?
I know that with the density of GSH I've had over the years both FA and submerged aquatic vegetation have been non-existent. I've tried to establish milfoil and sago pond weed a number of times without success. The only thing that I can get going is emergent vegetation along the pond edge, mainly smartweed and some sort of grass that does well in standing water, both need to sprout under dry conditions while water level is down. In dry springs I end up with quite a bit of it, in wet springs I have very little of when the water level comes up too quickly to get it established. In the past the bulk of my nutrient load gets cycled into an algae bloom with very green water. The danger with strong algae blooms are DO sags and fish kills which I have seen on a few occasions.
The other thing (tipping point) that I have seen with a high density of GSH is little to no recruitment of SMB, I assume that this related to a lack of cover for the fry to hide in or eggs in the nest are getting raided by GSH.
One of the goals of removing this many GSH was that I am hoping to see some SMB recruitment next year.
I suspect that with your horizontal aeration your water has become a little more green now that the FA is disappearing, the other possibility is that your submerged vegetation is doing well.
