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View Full Version : ph probes, test kits, oh my!!!!


kengeroo
06-26-2016, 10:56 PM
So I am pulling my hair out

my new apex ph probe is reading 7.91

while my seneye is reading 8.12

hagen ph hest kit 8.3
api test kit reads 8.2


I have calibrated the apex with pinpoint 10, 7 calibration fluid,, twice ...

any suggestions ?

e46er
06-27-2016, 12:56 AM
i wouldn't be overly concerned.

most people don't check their PH at all if they don't have a probe.
your in the ballpark so dont worry

kengeroo
06-27-2016, 01:03 AM
but when you spend over 1k on apex gear,, you'd expect it to match up with at least 1 out 3 other ph tests..

Craigdillman
06-27-2016, 02:36 AM
but when you spend over 1k on apex gear,, you'd expect it to match up with at least 1 out 3 other ph tests..

True

Myka
06-27-2016, 03:21 AM
So I am pulling my hair out

my new apex ph probe is reading 7.91

while my seneye is reading 8.12

hagen ph hest kit 8.3
api test kit reads 8.2


I have calibrated the apex with pinpoint 10, 7 calibration fluid,, twice ...

any suggestions ?

First suggestion: Throw out the Hagen and API kits and remove them from the equation. A pH test kit is fairly useless if you want to get within 2 points. Considering you calibrated the Apex probe, I'd be inclined to believe that the most. I'm not sure how Seneye usually compares.

I agree with e46er, you're within range, so I wouldn't be too concerned.

gregzz4
06-27-2016, 10:55 PM
I agree with the other replies
Have you checked the apex and seneye in new 7 and 10 fluids, after calibration?
Also, stray current and electrical fields can skew pH probe readings. Try putting some tank water in a glass and test that with the probes, but 1 at a time.

Myka
06-28-2016, 12:39 AM
I agree with the other replies
Have you checked the apex and seneye in new 7 and 10 fluids, after calibration?
Also, stray current and electrical fields can skew pH probe readings. Try putting some tank water in a glass and test that with the probes, but 1 at a time.

Good advice. :thumb: