pH Probe Review

[Crazy4Tangs]

I'm in the process of getting my new Ca reactor setup and I'm needing to purchase a pH probe. After looking around and reading up, I've come to the conclusion that the most dependable probe for my AC3 is Neptune's Lab-grade Probe. I've read too many cases of BRS probes loosing calibration too quickly, and that is something that I obviously can't afford to have happen with a Ca reactor. I've also read of people having compatibility issues with probes other than the Neptune probes. Anyone have any experience with these probes or any recommendations?

[Crazy4Tangs]

Ok, let me fix this. lol My controller is not an AC3 but rather the base Apex. According to Neptune, the Standard probe should be replaced every 12 months and the Lab Grade every 18 months. How accurate is that? Also, anyone have experience using a BRS probe with their Apex?