Lots of that on eBay. I've considered that myself. I'd think it would move beautifully in the current. My experience with eBay is that they usually sell tiny frags of macros, which arrive in rough shape, and die before they recover. The last one I ordered had ice in the bag! That one is available in larger amounts though, so it could work. The smaller the frag the shorter the fuse, so to speak. A larger plant can have some die off and still recover.