I continue to have problems with what I think is a major coontail invasion. The problem started 2 yrs ago and the past 2 summers my 3-4 acre pond has been covered with this weed (approx 50-75% coverage). I introduced some triploid grass carp two years ago per specs. recommended and they are now huge but have done little to mitigate the aquatic vegetation. I prefer not to use chemicals but may not have any other options. Can any of you help me confirm the identity of the vegetation from the attached pics and offer any solutions other than grass carp. Thanks in advance for your help.

pond veg1

http://i1383.photobucket.com/albums/ah311/GMD0911/Pond%20veg2_zpscnyc4tlo.jpg

http://i1383.photobucket.com/albums/ah311/GMD0911/Pond%20veg3_zpsis1jrfrr.jpg