It would be really hard for anyone to guess without seeing them. It really depends on where the tanks are, for instance if they are near a window and get sunlight. You could try just a couple of anubias to see how it goes without spending too much. I wouldn't even bother with a "system" like Walstad, just whatever gravel you like the most and low light plants such as anubias and crypts.
Last edited by somewhatshocked; 07-07-2013 at 02:11 PM.
Reason: ditch the attitude