Product Overview

Sonar, SePRO's flagship aquatic solution, comes in several distinct formulations to tackle the toughest nuisance aquatic vegetation, such as watermeal or duckweed. Together, all the formulations make Sonar a versatile solution, fit for nearly any environment.

Season-Long Control

Sonar is the most effective solution available for controlling duckweed, watermeal, and many other undesirable aquatic weeds. Sonar eliminates unwanted vegetation from lakes or ponds for a year or longer.

For more information

For more information about Sonar Aquatic Herbicide or assistance in designing a treatment prescription, contact a SePRO Technical Specialist.

Labels and SDS

May not be registered in all states. Always read and follow directions. Some precautions may apply for irrigation. See the product label for use directions.

Registered States

The Science of Sonar

By inhibiting the development of chlorophyll-protecting yellow pigments, Sonar allows sunlight to destroy chlorophyll, which in turn limits the plant's ability to make food. This delivers gradual, selective control of target weeds, allowing desirable vegetation and fish to re-establish themselves while preventing oxygen depletion. With Sonar you enjoy:

  • 30 to 60 days to control established weeds, full results within 90 days
  • Visual confirmation of Sonar’s action, as chlorosis (bleaching) gradually appears on the growing points of treated plants
SePRO’s Research and Expertise
  • Over six years of research on product formulation, release rates, and pond sediment
  • Multiple, distinct Sonar formulations
  • Selective and broad-spectrum capabilities
  • Flexible enough to adapt to different waterbody shapes and sizes, water flow patterns, aquatic plant species, and types of use
  • Effective solution for fishing, swimming, or decorative lakes
  • No swimming, fishing, or drinking restrictions, even directly after application

Experts in Aquatic Solutions

SePRO’s Technical Specialists are trained to assist you with your toughest issues, from aquatic weeds that keep coming back to nusiance or toxic algae that are plaguing a water body. See how we can help.

Experts in Ornamental Solutions

SePRO provides high-quality solutions for insect and disease control, as well as plant growth regulation to help you bring healthy, sellable plants and produce to your customers. See how we can help.