Water Gardening: Roots Growing into Pond, 1 by jomoncon

jomoncon wrote:
I have a very small pond made from a Rubbermaid cattle trough that is coming along quite nicely. This summer, all the plants became really overgrown, especially the elephant ears in the rear center. This morning, I noticed a long, skinny white thing in the water, and realized that the EE has sent a root down between the lining rocks into the water.

While I doubt that this will hurt the tub, I wonder if the fish nibbling on it could be harmed? Most EE are poisonous.
Jo-Ann