Danny you were saying that your Ph probe is 1.5 years old What I would do is get another probe. My self i use the hand held HANNA ones with the PH and the Temp they arre great and the probe lasts along time.
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180 starfire front, LPS, millipora
Doesn't matter how much you have been reading until you take the plunge.
You don't know as much as you think.
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