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.