i bought the Lab Grade Double Junction pH Probe from brs back on january 17th. had problems at the git go from the moment it was received. contact brs that following monday. told them that it arrived bone dry and that it will not work properly. they told me to contact neptune. so i opened up a case with neptune. I told them the same thing it arrive bon dry and it will not work. they told me to restart my apex and calibrate it. so i did. i finished the calibration. it appeared correct until this past week. my reading on my ph is jumping from to as high as 8.5 maybe more. greatly disapointed in brs and apex products. i will be going with another ph probe that is not a pinpoint, apex or brs probes.
https://www.bulkreefsupply.com/lab-grade-double-junction-ph-probe-neptune-systems.html
https://www.bulkreefsupply.com/lab-grade-double-junction-ph-probe-neptune-systems.html