Does your pH controller read too high or too low when it needs to be calibrated?

[imcosmokramer]

it could be either. Also, make sure to rinse the probe in ro/di water every once in a while to ensure that nothing is obstructing the sensor.
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Roll A Joint

[banditpowdercoat]

Originally Posted by imcosmokramer

it could be either. Also, make sure to rinse the probe in ro/di water every once in a while to ensure that nothing is obstructing the sensor.

LOL, ya I had a HUGE sponge on mine LOL