You can buy sonar in quarts. Plan on treating it again next year or the 2nd year. Seeds which have been produced this year will lie dormant and sprout next year and thereafter. You will eventually need to retreat due to return of milfoil or some other weed. Do the math for your costs and amount of each herbicide needed. Aquathol superK is a granular and SonarAS is a liquid.
Last edited by Bill Cody; 08/11/14 08:38 PM.
