Lake Conroe has a volatile history of aquatic vegetation management. Hydrilla infested the reservoir soon after the reservoir filled, resulting in coverage of approximately 10,000 acres by the early 1980’s. To control hydrilla, large numbers diploid grass carp were stocked. Grass carp not only controlled hydrilla, but also eliminated most other aquatic vegetation in the
DeGray Lake was once known for thick beds of aquatic vegetation, which included non-native species such as hydrilla and Brazilian elodea that grew to as deep as 20 feet in some places and caused issues with boating and other recreation. In 2008 and 2009, extremely low water throughout winter exposed the root systems of this