Old PH probes

[daveonbass]

Ok, so I have finally replaced my old PH probes and now I finally KNOW what my PH levels are. (sadly they are at 7.73 at night and only slightly higher by day, 7.80)

But I now have to old and non working pinpoint PH probes...

What do I do with them...is there someplace I can get them re-set-up, (not calibrated, but set up like from the manufacturer) or do I just throw them out...?

seems a shame to just toss em.

dave

[Av8bluewater]

How far off are they ? And how old?

[daveonbass]

at least two years old now...

the true ph is 7.7...

one probe read between -1.4 and 3.4
and the other always read below -4.0

so they are way off...till I got a new one I just had to use some calibration fluid...and guesstimate what the true ph was by adding the amount that it was off by.

dave