So have you gotten anywhere with this because of the next hour or two I will be removing it all in flushing down the toilet if you want it you better figure it out but I’m sure I have a good gallon size bag of itIs it possible for you to pull out a small piece and get a close up picture under bright light, so I can see more detail? That would help ID the species, like B. plumosa or B. pennata (this site says B. pennata is preferred).