This aquarium houses dwarf species, like fish, shrimps and snails (excluding plant sp.). As well as that it's a home of diverse micro life forms, including algae, fungus, microorganisms and bacteria.
7/06/2007
Update;
I added Active Carbon to the Filter system to remove everything that might possibly hurt the shrimps and fish. Since I experienced a few shrimp deaths, I had to do something. I believe this was the best solution.