Decided to use the second probe connection on my apex for a second pH probe and removed the ORP probe. ORP probe for sale. Purchased about 3 months ago. Probe has never been dry currently stored with pH 4 solution on tip cap. New on BRS $70. Buy from me for $40. If you like you can pay via Paypal and I will mail to you. Email best way to reach me. I an in Escondido if you prefer to pick up.
Rdamaro@cox.net
Thanks