Robert Flory wrote:

"Dave Millman" wrote in message
...
Yes. pH tests fail when chemical buffers have been added. Since you are
wisely avoiding that path, you should be fine.

I beg to differ..... pH test don't fail when using buffers......

What fails when you use a phosphate buffer is the relationship between kH
and pH than can be used to calculate the CO2 concentration. Chuck Gadd's
calculator doesn't work if the buffering is due to something other than
bicarbonate.

Bob's right. My bad.