Small pond is a definite weed problem. I doubt that you will be able to kill all those cattails with one treatment application. You will likely see some regrowth when the new pond is full. It looks like you also have some submerged weed growth. Your question was:"I should probably get whatever is need to treat before I pump it down so it doesn't fill back up much before I can treat it. What would I need and where to get it?" Are you referring to treating the cattails or fish?


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