The green color is the experiment is the copper ions reacting, which then created the maroon color at the end of the lab.
The maroon copper is the aluminum being displaced by the copper.
The less aluminum to copper chloride will create a less intense reaction.
Distilled water - The tap water will change the reaction, but you can use either tap or distilled water. You can even do the same lab twice with both types of water and compare.
What eventually happens when you put Aluminum and Copper Chloride together?
When you put aluminum in copper chloride, the copper together the chloride eats away at the aluminum. There is a slight burning smell and smoke as a result of the chemical reaction. As the copper chlorides works away at the aluminum, the aluminum turning into a darkish maroon color.