Mike, I remember you saying that your grass carp had gotten too big, and aren't useful anymore. Is it worth putting in small gc every year to help control chara? Many people seem to have good results with them posted on the aquatic vegetation forum.
I'm just relating other peoples problem's, and solutions, but you've probably heard them all.
When you get your cage built are you gonna put in bt this fall, or wait untill spring? I'm thinking of using a small cage to put some of my larger pumpkinseed's in, and see how big I can get them.

Larry