"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.

Haylee lets off some hot air.

Today we discovered that when carbon dioxide mixes with water it creates carbonic acid. Check out the video demo with our BTB indicator. The blue water will change to yellow as carbon dioxide reacts with it to create carbonic acid. We finally got to the bottom of why our fish were dying. After a few investigations we concluded that the fish were poisoning themselves. They create carbon dioxide as water is pumped through their gills. Yikes! Our aquariums needed a quick water change. Hopefully this helped. We'll see on Monday. Keep your fingers crossed.