ph probe reading 3.0

[Laverna]

I calibrated the ph probe - all went well. It has been in use for one day now and the reading dropped to 3.0? Any insight as to why this would happen?

[AQD_ottawa]

Only reason could be membrane failure on the generic probe due to being knocked in transit.

try re calibrating if no go let me know by email sales@aqua-digital.com
and all will be resolved