I have had it with the stupid hornwort! I just grabbed al of it out of my 20 gallon nursery tank and threw it all in the trash. I am soooo sick of vacuuming the gravel and never being able to to catch all of the stupid fallen needles! For now on any plants I buy will have big fat leaves that don't fall off littering my floor. Phew, I'm back now I just had to get that off of my chest