Bjr I have a ZODIAC TRI-Pro 18 chlorinator bought at the end of 2015. For the next impoundment (April 2022) and the calibration of the probes, I would be interested in buying the pH and Redox ACL probes Are these 2 probes that you offer on your site can be installed on the existing POD and composed of 2 probes (1 red and 1 blue). Thank you for your feedback. Alright.