Posted: Sat, 4 Oct 2025 10:02 AM - 27 Readers

By: AustinTexas.gov

To address this, the City of Austin plans to stock additional sterile grass carp this fall, as these fish preferentially consume hydrilla and represent the most environmentally responsible control method. Officials aim for a stocking rate of five carp per acre of hydrilla to reduce its density while preserving native plants. Lowering lake levels, though considered by some residents, is not deemed effective for hydrilla control and could potentially worsen its spread by eliminating competing species. Residents are encouraged to help prevent further spread by cleaning boats and gear, avoiding dense vegetation patches, and properly disposing of plant fragments to avoid fines.