I am having a 1.2 acre pond dug in Maine in about a month. It will primarily be filled with ground water but there is a rivulet that flows after rain, snowmelt, etc. that will flow directly into and out of it as well. We have had record rainfall this summer so it has been flowing almost nonstop since June. I noticed this ugly brown plant growing in it and thought I would reach out to the community here for some help. The water around here tends to be tannic and looks like dilute coffee.
What is it? Should I be worried about it? Is it harmful or just ugly? Is it here only because of the record rainfall this year, or should I expect it to be in the pond as well? Is there something I can do about it preemptively before the excavator arrives next month, or something I can do about it after the fact? Will crayfish take care of it?
Thanks in advance for any help here from the professionals. I can take some close up photos if that's helpful.
