Depending on the species and abundance of these weeds, it is often necessary to control them. Aside from the aesthetic value of a well kept pond, an over abundance of weeds can create a hazard for aquatic life, offensive odors, breeding grounds for mosquitoes, and a hindrance to water sports.
Mechanical control is useful in the event it is a small pond and the weeds are minimal.
One can pull out or dig out the problem weeds. It is time consuming and eventually impossible if let go. These fish do not breed in standing water, and eat only weeds. Re-stocking will be necessary periodically. Chemical contro l requires specific weed identification, and treatment as necessary with either an algaecide or herbicide.