The pH should be right if you follow the instructions.
Alcian blue can stain glass, and probably isn't good
for pH meter electrodes.
-- 
-------------------------
John A. Kiernan
Department of Anatomy and Cell Biology
The University of Western Ontario
London,   Canada   N6A 5C1
   kiernan@uwo.ca
   http://publish.uwo.ca/~jkiernan/
_________________________________________

"Tague, Curtis" wrote:
> 
> Is it vital that we reach a pH of 2.5 or is it usually "close enough" to just mix the solution as the recipe says?
> The reason I ask is because pH 2.5 uses glacial acetic while pH 1.0 uses hydrochloric acid. It seems to me that is would be close enough to just mix it, that's what I've been told anyway.
__________________________________________