Bill D, I went with Scott at HoosierPondPros and his calculations regarding the amount needed. I bought the concentrated Sonar/Fluridone. Its hard to find now for even the $700 quart I paid, but it really does work. I had way too many Lilly Pads on my pond too and it's knocked them back a bunch also. A complete win for me so far.
I believe I'll use a pint now ever year for the next couple then I can start skipping a few years between applications (if we're still here).
