Here in E Texas and N. La American pondweed seems to reduce nutrients and help to clear up the water from what I have seen. But as I understand it, it can be invasive in certain parts of the country or if the pond is more shallow than deep. For me, I would much prefer the pondweed over the Hyacinth. And every time I hear Bob Lusk mention good plants he talks about American pondweed.
Do not judge me by the politicians in my City, State or Federal Government.
