Has anyone experienced a lagging ph probe?

[WVReefJunkie]

Seems like it takes a long time for my apex ph probe to show a change in ph. After calibration it seems slow to produce a change even when checking it in the calibration fluid.

 

[jsker]

The best bet is to go to Neptune and fill out a support ticket. is the a classic or 2016 Apex?

 

[WVReefJunkie]

Ok, classic