ewest,
Another great post. You clearly understand the engineering approach I'm trying to use to isolate variables and determine consequences. The problem is there are so many complex variables.
I realize the shortcomings of my approach and my own knowledge, perhaps better than anyone...but I'm trying to understand something which has been a central disappointment for me in Pond Meistering, the lack of aggressive behavior in LMB.
Honestly, I would appreciate any suggestions to change of approach or other "experiments" I could try. I'm willing and able, well sort of able

, to build another pond just for such an experiment...and if I come on too strong, please remember it isn't personal, just a drive inside me that I have had since birth to find answers to complex questions.
It's a journey, not a destination.
p.s. guess you understand now why I don't like fertilization...you should have seen what it did to this pond, when I followed well meaning advice herein and fertilized to get rid of weeds by shading them out..it was a veritable explosion of weeds and I still have not recovered two years later.