Again, I apologize for getting started in this forum on the wrong foot.
Ewest, thank you for your comments and information
Burgermeister, The pond that we removed the hydrilla from is a pond probably no larger than 2 acres...maybe more like 1.5 acres, so that is why the product took effect in such a short time. The product utilizes a forumulation of 38 billion microbes per gallon.