We will see what happens tomorrow as our plants sit in their flasks.
Bromothymol blue is an indicator that lets us know the approximate pH (how acidic) of a solution. When we bubble carbon dioxide through the water, the pH is lowered because we are creating carbonic acid.
As you can see, we lowered the pH of our flasks from around 8-10 down to around a 6.
Let's see what happens tomorrow!!