Sonar (Fluridone)

Sonar AS Liquid is a selective, root killing, systemic herbicide that does not cause oxygen depletion.  It is absorbed by leaves and stems directly from the water and by the roots from the hydrosoil. Sonar inhibits the ability to produce carotene. Without this ability, chlorophyll is rapidly degraded by sunlight and the weed dies. It is extremely concentrated and a few ounces in a small pond will keep the weeds out all summer.  Entire ponds should be treated at one time and it should be applied early in the season. Sonar Q Granular comes in quick release pellets that move throughout the pond for excellent widespread control of submerged weeds.