I bought a used apex last year. The seller included an ORP probe which I never used. The solution he shipped it in dried up. Can I use a kit like this then a calibration or is it a goner? I'm using it on a nitrate reactor so it will be reading negative.
https://www.amazon.com/gp/aw/d/B007Z4DW7W/ref=cm_cr_arp_mb_bdcrb_top?ie=UTF8
https://www.amazon.com/gp/aw/d/B007Z4DW7W/ref=cm_cr_arp_mb_bdcrb_top?ie=UTF8