Aquathol Super K granular herbicide is a highly concentrated granule form of Aquathol K liquid herbicide. Super K is 63% active ingredient and is for use in ponds and lakes. It has been shown to be effective against a broad range of aquatic plants. Aquathol Super K works especially well for early season curlyleaf pondweed, and should ideally be applied when water temps are between 55-60 degrees Fahrenheit. Make sure to check local permitting requirements when applying this product, and always adhere to label guidelines for proper dosing.