Hydrothol 191 is a liquid formulation that provides control of both weeds and algae. Used primarily as an algicide at rates of 0.05-0.3 ppm, it provides excellent control of a broad spectrum of algae including planktonic, filamentous, and branched algae. Hydrothol 191 also provides control of aquatic vascular plants and can be tank-mixed with Aquathol K to improve the efficacy on difficult-to-control weeds.
Hydrothol 191, works relatively quickly providing algae control in just a few days, and weed control similar to Aquathol K. There are no restrictions on treated water used for swimming, fishing or irrigation
Aquatic Products may not be registered for use in your state or locale. Check to be sure a specific use pattern is approved in your area before you purchase. Check product labeling or your local state agency for more information. Most current product labels are available by visiting the product manufacturers website or at https://www.cdms.net