When you use the fluridone, just remember that it takes 30-45 days to see results, which is a good thing in my book. Weeds dying slowly so you won't have to worry about a DO crash.
Yes, the Mi DEQ does make it hard. The way I understand it, if you have a permanent outflow structure on your pond, you have to apply for a pond stocking permit. The fish supplier has to get a copy of it or he/she can be in just as much trouble as the pond owner.
I wish it killed fast, I have 5 diffusers running 24/7 that supply enough oxygen.
I am just worried about rain and the natural springs(very minimal) washing out all the fluridone.