One lake here in Osceola County was not sprayed and was overtaken by hydrilla, could only get on the lake without an outboard or trolling motor. Lasted for about 2 years and POOF the hydrilla died off, the lake became clear enough to see 8 to 10 ft. There is some hydrilla on that lake now but not overtaken by any means.

Many mistakes have been made in attempts to take care of the invasive weed situation, The Nile Perch AKA Tilapia, Smelly fish, they overtake areas that were once full of bass for the spawn. Any time you hear "I am from the government, we are here to help" take it with a grain of salt. They did realize they goofed when they straightened the Kissimmee River, and have put it back