Maybe; but the "stuff" must first be IDed.
A clear/close-up photo would be very helpful. Place a coin next to the photographed portion of the plant for size-reference. Considering the plant's diminutive size, try to get as close as your len's focal-length will permit.
I was hoping the pencil would help with the size perspective. I have sent a sample to a local pond management vendor and will be bringing another sample to a biologist tomorrow to positively ID. I was being proactive by putting the question out assuming it is moss based on the thread so far and my additional findings, but I'm not going to purchase or go through the effort of using any type of chemical/herbacide/etc without knowing for sure....you make a great point I align with completely... it would be a waste of time, effort, and $$ and potentially would be pumping a bunch of unneccessary chemicals in the environment and my pond....i'm in total agreement with you and will ID before I proceed.
