Hi Ranger007,

Tilapia are good for a non chemical way to go. Try to contact Rex, AKA Rainman, by a PM. He would be able to tell you if they are legal to stock in your state.

Link to just one of many threads on tilapia;
http://forums.pondboss.com/ubbthreads.ph...true#Post321024

It is always a bit slower here around holiday weekends, but hopefully others will give a few more suggestions. I have been reading up on the FA also, and some folks use a pond dye in conjunction with the Cutrine. See this thread to see how Tums controls the FA to get a plankton bloom.
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=327960#Post327960