Client:
Hello, what is the difference between pH 4 and pH 10?
Technical Advisor:
These are solutions with different pH levels. If you look at your regulator's manual, it specifies the solutions to use. You can consult the manual here: url_of_the_manual
Client:
When we have pH 7 and pH 4, is it the same as pH 10 and pH 7?
Technical Advisor:
No, the solutions to use are determined by the regulator.