The old saying "The label is the law" goes for aquatic herbicides. Read the label on a container, the 2nd or 3rd page usually tells you where you can and cannot use it. As to why a certain herbicide that was used before cannot be used now, you have to ask the EPA that question, I have no idea.

As for cattails, Rodeo that has the same active ingredient as Roundup. You can also use Habitat, and Clearcast for the cattails. those both have different active ingredients.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).