Hanna PH issues

[RusticsReef]

I’m on my second Hanna PH checker and still having the same issue that it’s reading 8.5 or higher when my Calibrated Apex probe is reading 8.1. Have calibrated the Hanna as well. Also confirmed by my API test. Anyone else having this problem?

 

[Randy Holmes-Farley Verified Community Expert]

Folks getting blinking 8.6 readings is not uncommon to see in this forum.

I'm not sure what the problem with them is.

 

[Mike konesky]

Which pH checker? Are you dual point calibrating with 4.0 and 7.0, or 7.0 and 10.0?

 

[Randy Holmes-Farley Verified Community Expert]

Which pH checker? Are you dual point calibrating with 4.0 and 7.0, or 7.0 and 10.0?

The problems I note are with this device which cannot read normal calibration fluids:

Marine pH Checker® HC

Accurate. Repeatable. Chlorine testing made easy. No more subjectivity! Ideal for water quality, environmental testing, and pools & spas.

www.hannainst.com

Range

6.3 to 8.6 pH

 

[RusticsReef]

Which pH checker? Are you dual point calibrating with 4.0 and 7.0, or 7.0 and 10.0?

Hanna. 7 and 10