pH Ceiling
pH Ceiling
pH (eg)
We have included the pH ceiling on the Orenda Calculator to show you how high your pH will naturally rise. The more dissolved carbon dioxide (CO 2) in the water, the lower the pH, and vice versa:
↑ CO 2 dissolved = ↓ pH
↓ CO 2 dissolved = ↑pH
Learn more about CO 2 and pH here.
Henry's Law of physics explains why CO 2 must off-gas from a swimming pool to equalize with the air above the pool. The same exact physics applies to carbonated drinks that eventually go flat.
The precise point at which CO 2 is in equilibrium with CO 2 above the water is known as pH (eg), or as we at Orenda call it, the pH ceiling. This is the moment your pool is "flat". It is the highest your pH can naturally rise at a given carbonate alkalinity and temperature.
Factors such as auto-covers, acid feeders and trichlor feeders can suppress pH, but otherwise, the pH is heading toward the pH ceiling, thanks to physics.
