Join Date: Nov 2011
Location: South-central Washington State, USA
It's a tossup with hornwort, but it does tend to break apart and clog filters and create a mess... That being said, there are many instances where it stays rooted. So again, it's a tossup.
"One day...one day, this path will lead us to the White City, and the tower guard will take up the call: the Lords of Gondor have returned!"
–Boromir, The Lord Of The Rings