I'm not sure of the size...maybe 1.5 or 2 gal? It's an old tank, one of those kits from Wal-Mart. My goal was to have a bunch of brilliant green with a bright splash of red, so I added plants and just let them go wild (I actually prefer the overgrown look). You can't make it out very well in the pictures, but there is a branch starting at the top-back of the tank, sloping down to the front-center, wrapped with java moss.
some sand from a local stream, with a handful of soil at the bottom...and a ton of mulm on top.
the incadescant bulb was swapped out with a screw-in 14W compact flourescent.
Elite Mini Submersible filter (with the output nozzle up against a piece of wood to prevent too much flow).
a Tronic 50w...but that was removed as it was needed for a nano-reef. With the heater removed, the water temps sit in the mid 70's after the light is turned on.
java moss, cryptocoryne (Wendtii green?), duckweed
Betta splendens, and a few hitchiker snails.
Nothing but fish food and waste excreted from the Betta.
Here is a shot from the front:
from the left:
and the right: