Don,

Yes I have caught Tilapia on flies...and it is spectacular, tremendous fun. I have caught them on grasshopper imitations, but you have to fish for them just like bonefish...target individual fish in shallow water, place the fly right in front of them, and move it only slightly. They are absolutely a blast on a fly rod...but its just very difficult to get them into conditions where you can catch them, but when you do, man what fun!

p.s Don, have located a pair of red belly Pacus large enough(8 inches) for stocking in Pond...will let you know what happens.