Herkimer County SWCD – If you have a weed problem in your pond, you may want to consider stocking it with Grass Carp. These fish have a tremendous appetite for aquatic vegetation and can be used as a non-chemical agent to control weed growth in ponds, such as hydrilla, milfoil, coontail, elodea, and pondweeds.
The fish that are available for stocking are Triploid Grass Carp, which means they are sterile and cannot produce viable young. This non-native species of fish does not compete with native fish species that you may already have swimming around in your pond. Please note, these fish will not eat species such as cattails, bulrush, or water lilies.
Because Grass Carp are not native to New York and because they have huge appetites, a permit is required from the New York State Department of Environmental Conservation (NYS DEC). The Herkimer County Soil and Water Conservation District (SWCD) starts the permitting process now, with stocking to take place in June 2023. The permitting process conducted by the NYS DEC is free of charge.