[mordalphus]

No, marimo grows at a glacial pace. If you just tie it to a mesh or branch or rock it'll eventually take root though. I think it would take a long time for it to grow through plastic canvas

 

[planted goldfish]

guess ill try

 

[piffy]

marimo isn't a moss xD It actually is an algae ball, so I'm pretty sure it will just be squashed.

 

[Cboss]

I don't know about sandwiching it, but Eden Marel made a nice looking carpet out of marimo.

http://www.plantedtank.net/forums/myTanks/1741-Eden Marel.html