Unfortunately, I am fairly knowledgeable on milfoil treatments (though I'm not so good at spelling them). The main herbicide options you have are: Floridone (brand names include SONAR). This is a "systemic" herbicide: you must treat the entire lake with it and reach a certain concentration throughout. For a dug-out waterski pond, this probably makes no difference, but in a larger lake it can mean WAY more chemical introduced into the environment in total. Diquat Dibromide (brand names include Reward). This is a "contact" herbicide -- it only kills the weeds it actually lands on. Anything that misses on the way down bonds to sediments in such a way that it is biologically unavailable. (This means you could eat that sediment and none of the bad things that resulted would be caused by Diquat Dibromide.) In my opinion, the safety characteristics on Diquat are BY FAR the best, but it can't really be used to treat a true infestation on any but the smallest ponds. 2,4D (brand names include Aquacide). This is also more of a systemic herbicide, but I know a lot less about it because it is illegal to deploy into water here in Massachusetts (as are Sterile Grass Carp, btw). However, I know some lakes in Vermont had great success with it. The fundamental issues with herbicides are safety and frequency of treatment. Most likely you'll have to do it again about every two years. And of course, you are pouring toxic substances into your water, although if applied by an expert the safety characteristics on all three of these are as good as could possibly be hoped for. I believe all three are approved near well heads and in irrigation water, though usually there are "blackout" periods after application where certain uses must be avoided. There are all sorts of other "interesting" treatments for milfoil, some of which have had great success in a handful of spots, but haven't proven consistently effective. These include milfoil weevils and water circulators (NOT aerators: circulators). And in a small pond, just plain chopping it down on a regular basis can work. (Don't try that on a new infestation in a larger pond -- the fragments become new plants and you spread it orders of magnitude faster!) Unfortunately it's VERY hard to get reliable, unbaised information on milfoil treatment. So many parties have vested interests or agendas, and all sorts of "whack jobs" are more than happy to exaggerate the potential downsides of any given treatment. GOOD LUCK! (And welcome to the fraternity...)