Change and recalibration of Astralpool Smart Next filtration probes.

Client :
Probe for astralpool smart next filtration. Both need to be replaced... they are from 2019 and I have an abnormally high free chlorine level.

Technical Advisor :
pH or redox probe. Okay, one moment.

Technical Advisor :
https://ph-redox-pool.com/gb/astralpool/3234-ph-probes-for-smart-next.html
https://ph-redox-pool.com/gb/astralpool/3235-orp-probes--for-smart-next.html

Client :
Perfect, thank you! Just one more question: should I recalibrate the probes before restarting the filtration?

Technical Advisor :
It is recommended as it depends on the probe and also the regulator. From memory, pH4, pH7, 475mv.

Client :
Yes, I bought the products last month. Thank you very much for your responsiveness. Best regards.

Technical Advisor :
OK.