Cannorcreek I had Eurasian milfoil as bad or worse then your pond. I put in 18 grass carp into my one acre pond and in 4 years the Eurasian milfoil and about every other submerged plant was gone. 18 was too many. I had a terrible winter fish kill and lost nearly all my fish, so I am starting to add grass carp six at a time so I don't eliminate all of the plants. I would like to add six more now but I don't want to take a chance of a winter kill taking them out right after I put them in so I will add them in the spring. Beside the grass carp I put in 20 KOI and 6 Israeli carp to control the FA algae so My pond went from looking like yours to this in four years.
