Apex ph probe not calibrating

[Luisg951]

My pH probe Keeps reading 4.00 i tested the water on both my tanks and on a new batch of salt mix I tried to calibrate & I keep getting calibration failure.

 

[ss95003]

That means you need a new probe. They don't last forever. If it sat dry out of water that will ruin it too.

 

[Jimmyb819]

+1 need a new probe. BRS has a good deal for thier lab grade probe. I replaced mine with it and so far it's great.

 

[trido]

Yep, dead probe.