I know of one pond in particular in Farmers Branch that is loaded with big bass and huge bluegills that has that dye added. Right after they treated it, they put a fence all the way around it.The walking trail is there,and it is surrounded by offices, but no more fishing. I went by there during the spawn and saw some huge bass on beds, hugging the bank. I used to fish that pond when I was in high school and it was a watering hole for the horses the original owner used to board there. Now it's an office park surrounded by businesses of all manner and sort.