Hello Jlynch! And Welcome! I would start your knowledge journey on pond plants
here. I would also dip out some of the weeds and take focused close ups of a spread out/single sample with a white background. We have many experts who visit the forum, along with the rest of us who've learned via the school of hard knocks. We can give you better advice with better information as to the specific 'weed' we are seeing.
My initial two cents is lots of duck weed, but hard to say from that distance.
