What do grass carp eat when pond is frozen?

When a pond is frozen, grass carp may have limited access to their typical food sources, such as aquatic plants. However, they can survive on detritus or organic matter that settles on the pond bottom, as well as any remaining plant material that may be accessible. In some cases, they might also consume algae or other microorganisms present in the water column, though their feeding activity generally decreases significantly in cold temperatures.