I had the same stuff in my small, 1/4 acre pond in NE Ohio. I found that Green Clean Pro would cause the bottom mats to float to the surface (in a very short time) and I removed them manually. Since adding Tilapia in June, the floating mats have disappeared. I found the bottom mats only formed in shallow areas so were easy to treat. I use bottom aeration, a small amount of dye, and have never used any copper based products. Good, bad, or indifferent, I only run air at night�.to try and keep the water temperature down.
