Naiad is not really a showstopper. But like anything else, it can get out of hand without competition and lots of untaken nutrients. The cattails are pond owners choice. As a manager, I like to have one stand of them, maybe 2-3% of a ponds shoreline, but way in the back. I limit them to one area for diversity of marginals. If you cut the catkins off when they are green and limit the rhizome spread they are not horribly invasive. But if you let them go, they are a nightmare. They are very difficult to eradicate.
