Thank you, that may be the most thorough and understandable explanation I have ever heard of this topic. Since the CO2 does not affect the salts the change in pH does not result in any osmotic stress to the fish. Makes perfect sense. That also means that probably some of the pH down products are far more dangerous then the higher pH of the water.

I appreciate your approach, from what I can tell a lot of published information out there is based more on speculation and conjecture rather then science.

Fred