Can you lower the pH of Tergazyme using Citric acid or vinegar?
Yes. To adjust the pH of a 1% Tergazyme solution from pH 9.5 to about pH 8.5 add 0.1 grams of 99% anhydrous citric acid for each 5 grams of Tergazyme. To get to pH 8.0 add 0.2 oz of citric acid. White table vinegar that is typically 5-8% active by weight, use roughly 2 ounces of vinegar added to 4 gallons of 1% Tergazyme solution that has 5 ounces of Tergazyme in it to get about a pH 8.5 solution, and use roughly 4 ounces of vinegar to get a pH 8.0 solution. Use a calibrated pH meter with stirring to monitor additions.
To view the technical bulletin for Tergazyme, please download this PDF.