Can I use Sonar in my pond?
Sonar is a wonderful herbicide to use. Safe, effective, easy to use, and broad spectrum, killing most all aquatic plants. So, why would I not want to use it in my pond?
Sonar is a systemic herbicide that needs to stay in the water for a length of time, generally 30 days, to control plants like duckweed and submerged plants. If you have a pond that has constant flow though it, I would recommend not using it. If it is completely land locked or looses water only when it rains, then you’d likely have success using it.
As mentioned earlier, you want the Sonar to stay in the water as long as possible. One way to do this is to spread the recommended dosage out over a number of weeks. If the label states that the bottle will cover 1/8 an acre, as Sonar RTU states, to that 1/8 acres pond use 1/2 the bottle day one, 1/4 one week later, and the remainder 1 week after that. Or shortly after a rain, add a “bump” treatment to keep the product in the water long enough to be effective.