I am looking to treat a 20 acre lake for Pondweed in Michigan. The weeds are pretty severe, covering about 70% of the lakes surface. This lake is a pretty consistent 10' throughout the entire lake. Looks like a Herbicide application would run about $8k or more, which I simply cannot afford.

I'm considering Dye now and wondering if anyone has had experience treating Pondweed with Dye. I think this lake would be a great candidate because these weeds are having to come to the surface from so far down (10'). I am considering this option to treat for the 2017 season by using the product in March / April.

This lake does have a small overflow / outflow. I read on the Michigan DEQ's website that any Dye classified as a 'Herbicide' (like Aquashade) cannot be applied to a body of water with an outflow. It seems as if I am able to use another brand like 'Cygnet Select' since it is not labeled as a Herbicide. Can anyone confirm?

I'd appreciate any input or to hear about any experiences.

Thank you,
Dan