I have a 5"x5" mat of riccia for trade. It's more than an inch thick and is growing as I write ;-). It's never been tethered down, it's a floater. I'm looking for a couple of crypts or a couple of small anubias. I'm not picky about specific species of either, I'm just trying to diversify. Contact me off-list. Jamie, enjoying the spenders of autumn in SC.