ph calibration

HI All! TL;DR: Why would an Apex Jr and Apex Pro report pH numbers that are ~.20 different and Temp ~0.8 different? Am I worrying over nothing? Is that variance normal? Here's the long version. I installed a new Apex Jr system in my 90g tank a few days ago, went through the pH calibration...

I just updated the AOS for my Apex to version 5.11_6A23. Since the update, I've had very inconsistent pH data, even after calibrating several times. I've calibrated via Fusion, locally and the display module. Upon calibration, I'll place the pH probe back into the pH standards, and it is almost...

I'm going to assume that my PH Probe needs to be recalibrated, but wanted to see if anyone else has seen odd reading like this and if there could be another reason for it. It just started all of a sudden earlier in the month.

Hi everyone. I have some pH4 and pH7 buffer solution for calibrating my pH probe, but is there any difference in the various products becide price ? They are all 4.01 at 25°C and 7.00 at 25°C.. I can see that I can buy it alot cheeper from Agro-culture shops than from the Aquarium shops.. Is it...

I have a Kore 7th with a KHLab for automatic Alkalinity test with pH probes. The manual says A single pH probe from Pacific Sun is 90€ ($109 + shipping); they use BNC connectors. At that price, I can get two Milwaukee SE220 Lab Grade Double Junction pH Probe, with free shipping. Is there a...

Ph Temp Probe is used to detect PH and Temperature in a aquarium / fish tank, the code will also create a EasyIoT entry on the cloud. 3D plastic cover decrease the flow of water for more accurate reading. 3D DIY print cover: https://www.thingiverse.com/thing:4825350 code...

Background; - New tank, Waterbox 220.6, cycling. No water changes to date, tank has been wet for a couple weeks. - All dry Marco rock going in. - Using the APEX conductivity and Ph probes - Tank between 78-79 degrees - Used Kent Reef Salt Mix, https://www.kentmarine.com/products/sea-salt.htm -...

I recently purchased an apex EL.. I’m currently running a Jr with a brs ph probe.. it was time to calibrate my probe so instead I just grabbed the new ph probe from the el and ran it on my Jr until I had my mounting board ready then I switched to the EL last Sunday and the reading was off which...

So I tried being a responsible reefer today and decided to clean and recalibrate my pH probe. Well afterwards the reading is now significantly off. My pH is usually 7.9-8.1, my pH probe is now reading 7.47. It’s strange because when I have the probe in the different calibrating solutions...