jmartin, saw yer other post as well, welcome to PB,
my first reaction: sounds like you have alot of shallows on a BIG POND....congratulations on the pond size, it must be beautiful. bottom diffused aeration has been a key for me to reduce visibility, promote phytoplanton blooms (giving a nice murky olive green color to water) and thereby reducing sunlight penetration and macrophyte (aquatic weed) growth. i have used no chemicals, and reduced FA and elodea through simple aeration....this is one thing to consider, lets see who else has feedback for you....
dave
