I know about the high waters in 07-08. Incidentally, my father was one of the engineers that built the lone cabbage dock area (on Lk. poinset). The dock was built to be useable at 12' above the water line. If memory serves me correctly, the water came to 11' above the normal water line. With that being said, hydrilla is very prolific and can reproduce in 4 ways; Fragmentation, Tubers, Turions, and Seeds. high water would only stop seeding. The same applies to duck weed. I find it very hard to believe high water levels are the cause, as the water lever for the past 4 years has been marginally above the natural waterline, and thus the vegetation should have come back. As other members have commented, what ever chemicals are being used, it is killing everything. it's so bad now, that when the water line rose and flooded over in Mims a year or so ago, it killed some of the non-water vegetation (area surround Seminole ranch) and has made it a little more difficult to grow small crops. This was not a massive flooding event either, and it should have brought sediments and encouraged growth.
Most Common phrases out of a duckers mouth:
Why couldn't you have been born a duck!!!
OH S*&T, DUCKS!
Damn tweedy bird, you about got shot.
There's a whole bunch of duc..oh wait, tweety birds.
I about turned this mosquito into a duck
I just got ate up