Planted Tank Guru
Join Date: Feb 2011
Location: Beaverton, Oregon
Anubias grows really slow in emergent conditions I can tell you that so putting it in your riparium might not be a good idea unless you're placing it in the submersed portion.
Blyxa is very bouyant... It'll take some patience and lots of replanting to get it to stay. You can also plant it with a few leaves on the bottom that act as hooks into the substrate, preventing it to uproot again.