"Goodnight Elodea."

We found the other day that organisms, like goldfish, give off carbon dioxide. In an aquatic environment the carbon dioxide can mix with the water and result in carbonic acid. This is bad for the fish. We were unsure if plants gave off much carbon dioxide. We wondered if they react differently at night. Our tests were all done in a daytime environment. So, I placed some elodea in my closet for the weekend. If the plant gives off a lot of carbon dioxide it will change the blue water to yellow. What do you think will happen? Let me know what you think and leave a comment.