Hmm. Roundup Custom is labeled as an aquatic herbicide. As for Rodeo Aquatic Herbicide, this product appears to have been discontinued by the manufacturer (per several websites I've visited). It's also out of stock at many places. I believe
Alligare makes a product that is comparable to Rodeo.
Habitat and Clearcast are more than 3 times more expensive than Rodeo. Not sure why anyone would use that if the former is just as effective.
Can I use Diquat for cattails?
What is FHM?