How to properly set up an eco-column project?

The terrestrial chamber contains soil. We can also add worms and insects to this chamber. 
The decomposition chamber contains seeds, leaves, grass clippings, and other dead organic matter.
The aquatic chamber will contain gravel, rocks, water, small fish, and other aquatic plants

1. Rinse two clear gallon bottles and remove the labels.
2. Use scissors or Exacto knife and Cut about 20cm from the top of the first bottle.
3. Then cut about 20cm from the bottom of the second bottle.
4. Poke little holes on both of the gallons caps.
5. Add soil and dead organic matters to the first half-gallon bottle side. (The side with caps)
6. Add sands and gravel to the second empty half-gallon bottles. (The side with caps.)
7. Place the first half bottle that just filled with soil and dead organic matters, opening facing down, onto the second half-gallon bottle that just filled with gravel and sand.
8. Add water, rocks, and small aquatic plants in either one of the empty bottom half-gallon bottles. (Use the one with the most space)
9. Stack the 3 chambers. The Terrestial on top, Decomposition in the middle, and Aquatic below them.
10. Add 1-2 cups of water into the soil of the Terrestrial Chamber. The water will go through the soil and travel to the bottom.

You may also add earthworms in the Terrestrial chamber and Tiny fish inside the Aquatic chamber. You may dispose of the other empty bottom half-gallon bottle.