Sep 29, 2012 #2 OP OP Impulse09 Aquarium Advice Freak Joined Oct 18, 2011 Messages 397 Or dwarf water lettuce?
Sep 29, 2012 #3 Atxpunx Aquarium Advice FINatic Joined May 29, 2011 Messages 989 Location Tyler, TX Bamaplants .com sells frogbit and azolla. He's a good guy to deal with. Shipping is around 6 bucks.
Sep 30, 2012 #4 54seaweed Macro Addict Joined Apr 3, 2012 Messages 7,807 Location Colorado http://www.aquaculturestore.com/Fresh-and-Saltwater-Algae-And-Plants/