The risk of oxygen depletion becomes greater as we enter the hot days of summer. Biological control usually refers to triploid grass carp. Grass carp, when stocked at the proper density, primarily aid in the control of the submerged plants or mosses. By state law, grass carp must be permitted through Texas Parks and Wildlife before being purchased. They may only be purchased from a fish farm holding an Exotic Species Permit.
Mechanical control involves the use of weed harvesters, seines or even hand removal.
This technique is usually of limited value in typical farm ponds. Don't guess at what you're trying to control. It's possible to combine chemical, biological and mechanical controls, Higginbotham noted.