PH between 8.5-8.7

SeeFu · Apr 15, 2020

i was curious to see whatn i had the ph change and here's what it looked like on apex. i'm guessing the only way i get something that dramatic of a change is calibration? funny how i dont see the 7.0 and 10.0 from calibration though.

Shirak · Apr 15, 2020

It won't show readings when it's calibrating. It should show a reading if you finish calibrating and then go back and put the probe into each solution and wait for it to take a reading. I set data logging to 1 minute so I don't have to wait long for it to record a reading. I just did mine recently but unfortunately it's off the chart now. For the following week though it clearly had the swing to both 7 and 10 one right after the other.

SeeFu · Apr 15, 2020

just tried soaking in vinegar for 15 min and then recalibrating. still same issue.

Randy Holmes-Farley · Apr 15, 2020

SeeFu said:
i was curious to see whatn i had the ph change and here's what it looked like on apex. i'm guessing the only way i get something that dramatic of a change is calibration? funny how i dont see the 7.0 and 10.0 from calibration though.

Interesting, and yes, likely calibration or interference of some sort. Did you have a power failure then?

SeeFu · Apr 17, 2020

just got my new ph probe and this one wont read calibration fluid correctly. i calibrate it and afterwards I place it in the calibration fluid and it always reads 0.20 to high. I guess its an Apex issue now?

Shirak · Apr 17, 2020

SeeFu said:
just got my new ph probe and this one wont read calibration fluid correctly. i calibrate it and afterwards I place it in the calibration fluid and it always reads 0.20 to high. I guess its an Apex issue now?

That just doesn't seem possible if it's calibrating correctly. Can you walk us through each step? I messed up my calibration a few times hitting next before the reading settled. I always do the advanced manual mode calibration too.

How long are you leaving it in the calibration fluid afterwards to see if it's reading those correctly?

SeeFu · Apr 17, 2020

well problem solved. all i had to do was reset the apex. wow what a mess.

SeeFu · Apr 17, 2020

now i know i can start 2 part w/ soda ash instead of sodium bicarbonate. lol

SeeFu · Apr 18, 2020

thanks to everyone for their input on this.

Shirak · Apr 18, 2020

Glad you were able to get it working properly!

sarcophytonIndy · Apr 18, 2020

Mine stays on the high side, but not that high. Might want to calibrate the probe

SeeFu · Apr 18, 2020

wow how did you get that chart format

bcarl77 · Sep 1, 2020

Sorry to bump an old thread. I have a similar issue with my Apex. Used to run Soda lime on my skimmer and would top around 8.35. Recalibrated at 7 and 10 multiple times and now it would hit about 8.6 if I run soda lime with ALK at 8. What did you reset on your apex which resolved this?

Will try an aeration test as well before messing with my Apex.