This is the setup for the plants...
...The two baskets in back are for the Peace Lillies and clay beads are used as the media. The black eggcrate in front is for the cuttings of Pothos, parrot's feather, etc. The two wire grates on the sides are for other plants such as orchids and bromeliads, which do not want to be in the water but like the humidity from below.
The tank's primary filtration is a wet-dry but after my positive experience with the plants, I would not do a big tank without them. Here is the build thread if anyone is curious...
I really like the screen set up above the tank. Are the baskets removable? Very nice design, thanks for posting.