pH Problem Solving in Swimming Pools: Exchange Between Customer and Technical Advisor

Client:
Hello,

Technical Advisor:
Hello

Client:
If I have a pH problem between the reading on the pump and the test strips, do I just need to change the probe? Thank you

Technical Advisor:
What difference do you have?

Client:
On the test strips, the pH is lower than normal, around 7.2-7.3, and on the pump it's higher than 8. It was fine last week.

Technical Advisor:
So first, test your probe like this

Technical Advisor:
https://ph-redox-pool.com/gb/content/16-ma-sonde-ph-est-elle-hors-service-

Client:
Alright. I will test it this afternoon. Thank you very much.

Technical Advisor:
Ok