Please refer to the following thread:
http://www.ctfisherman.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=997015#Post997015

It appears the lake is suffering from hypoxia. There is virtually no vegetation left in the lake to re supply it with O2. I know that there is some absorption through surface interaction but apparently its not enough.

This nonesense of chemical erradication of aquatic vegetation needs to stop. When will Fisheries try to stop the permit process to protect our resources?