Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Controlling American Pondweed

Hi and welcome to the forum!

Fluridone worked for me on a stubborn case of American Pondweed - cleaned things up in about 5 weeks. Bear in mind it's designed to treat ALL vegetation - so everything gets nuked - there's no measure of control. As a result, all of my excess nutrients were utilized readily by Filamentous Algae and Chara which quickly replaced the AP - so I went from beneficial vegetation to problem algae - although Chara is certainly better than FA.

Other treatment options include aforementioned grass carp, aqua shade before plants get going and towards the surface in the Spring, and aeration helps reduce nutrients on the pond bottom which accumulate and provide the food necessary for excessive vegetation.

Bottom line - something is going to utilize your nutrients in the pond. American pondweed is what most of us consider a very beneficial plant - in moderation, so I'd strongly advise against complete eradication [fluridone]. Think about treating sections of the pond with some of the products Esshup mentions - maybe 25%-40% - and see if you can live with it. Again, AP is a great cultivar for your pond compared to others which can become serious issues in a hurry.