If you don't have a fish in the tank, you can use a piece of cocktail shrimp in a tea bag--it may be a bit less messy than blood worms. In a tank this small, I would probably opt for a sponge filter and extra gravel to give the bacteria more surfaces to cling to. Live plants will also help you immensely--I highly recommend getting some easy live plants, particularly java moss, java fern, and anubias. These are very forgiving plants that flourish in low light.
Do you have a liquid master test kit yet?
Last edited by Adastra; 10-13-2010 at 01:06 PM.