So... I bought some Riccia a few months ago, and its been growing quite well, but I am having a great deal of difficulty getting it to stay anchored. This stuff seems to have a very strong (and undesirable) tendency to float. I love the way it looks when its planted/anchored to the substrate (like the beautiful Amano setups), but I've had a very tough time trying to get it to stay put. I've tried a couple different methods (incuding many, many plant weights and fishing line) and I was just wondering what everybody else does. Any ideas?