Bassman, Welcome to the forum!

I don't know much about aquatic plants--My pond has zero vegitation!

Will white amur (grass carp) eat milfoil? I know that tilapia will, but not sure if they're legal in your state. Alum will help lessen the growth of all plants temporarily by binding up the soluable phosphorus. You may want to try a combo approach.

Personally, I stay far far awy from the copper sulfate due to the long term heavy metal problems it causes.

With those nasty little bullheads, you're a very lucky man to have clear water.