This is a continuation of this thread.
You're saying exactly what I'm saying : aeration removes the carbonic acid.Originally Posted by waterbear
Actually it removes only one thing - carbon dioxide. The equilibria of the system do the rest of the job. The CO2 that you kicked out by aeration came from the HCO3-, hence you reduced your HCO3-, namely you reduced your alkalinity.
There are only three ways to reduce your alkalinity :
2. Forming an insoluble salt with carbonate (for instance calcium carbonate.)
3. Getting read of CO2.
This is what aeration does. The process of doing it in the pool is lowering the pH first so that more carbonic acid is available and hence more free CO2 is dissolved in the water, but lowering the pH per se doesn't lower the alkalinity because the CO2 is still there .
If you still think I'm wrong, please show me how can aeration increase the pH without removing CO2 out, and how removing CO2 out doesn't effect alkalinity.
If you can do that, then you'll disprove the law of conservation of matter.