Thank you very much for your excellent advice.

I only struggle with FA in the spring because once the soggy spring is over I can get my jetski on the pond and you can't beat that for aeration.

I've been chem free for 2 yrs now but last year my dam leak got worse and we had a record hot dry summer and I didn't have enough water to jetski after mid July. So it's baaaack. Add a sunnier January-February than normal and BLOOM!

And I don't want to kill the good stuff, like you said. I also don't want my Amurs getting HUGE.
I like the idea of your sedges. I am very wary of adding cultivars. Lilly pads have conquered every other pond around here completely--those are very troublesome for alot of folks. Have you been to Lake Hope lately? The whole east end of it is now a Lilly Pad.
Thank you again and I will keep researching.