PH probe calibration question

[Douglas]

I have a pH probe that came with my controller. It came with a "one time use" Ph callibration pouch, which i used to very first time.

I shut down for a while, and now i'm starting back up again. Is there a certain way to clean it first, and then re-calibrate it? I've seen several different types/levels of calibration fluids avalible. What is recomended? Can someone inform me on what to do?

[sphelps]

Did you keep the probe end wet? If dried out, but new probe. Otherwise just buy new fluid and recalibrate. You can clean the probe with water and a toothbrush if needed.

[Douglas]

The probe did dry out. Did not know i had to keep it wet. So, i guess a new probe may be nessesary. Are all brands of probes compatible with all controllers? Or do i need to buy the controller brand. And i've seen several levels of calibration fluids avalible.....Which one?

[sphelps]

What kind of controller? Typically probes are compatible. I got a good deal on an Neptune probe (standard grade) so I use it with my profilux and it's fine.

[Douglas]

I have a Digital Aquatic controller, and found the Ph probe handy to have.

[sphelps]

Yeah so any probe with standard BNC connection, such as Digital Aquatics, Pinpoint, Neptune, ect. I'm not sure you'll notice much difference in accuracy between any of them, maybe on lab grade models. For fluid just get same brand as probe, you need a high and low. If your goal is to measure tank pH (~8) then you should buy 7.0 & 10.0. If your goal is measure reactor pH (~6.5) then by 4.0 & 7.0.

Make sense?