2thDoc:

Nice to see some humor. \:D While this forum is not always fast it is accurate -- and that is good.

The thing that first jumped out at me was the question of what will happen this summer when it is 100 degrees , the water is very warm and the dead grass decay reaches a high point-- in a shallow pond 8ft. ? You may have a DO problem as in not enough oxygen . The well water if oxygenated may help with temps. and DO if its vol. is enough. You may need aeration.

Structure links :

http://www.pondboss.com/ubb/ultimatebb.php?ubb=get_topic;f=4;t=000137#000003

http://www.pondboss.com/ubb/ultimatebb.php?ubb=get_topic;f=4;t=000138#000007

http://www.sdafs.org/reservoir/manuals/habitat/Main.htm

Pics. of the lake would help. If SC allows tilapia that may be an option and would add to your forage base.

You might contact Gerg Grimes who works your area and he could take a look and make an assessment both as to weeds , water quality and fish. I would hold off on chems. and carp pending a better evaluation of the above.