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I recalibrated all my probes last weekend. I have also used Hanna pH test and it matches the probes.
How about alkalinity? Do you have an alternate method of testing that? There is a direct correlation between Alkalinity and pH.
Check out this article:
I do not see how you could have both an alkalinity of 10.48 and a pH of 8.75 at the same time.
Something is not right.
i double checked the alkalinity with a Hanna checker and it too registers what my Apex is reporting. I am thinking my issues are being self inflicted by my calcium reactor setup. I turned the calcium reactor off and PH slowly dropped and levelled out around 8.5. Alkalinity also started to slowly lower. I turned the calcium reactor off around 3 yesterday.I recalibrated all my probes last weekend. I have also used Hanna pH test and it matches the probes.
So my probes and my Hanna checkers are both incorrect since they are reporting the same numbers?If you mean a CaCO3/CO2 reactor, it is never a cause of high pH, whether it is properly set up or not. All it can do is lower pH.
The measurement is test error if a normal reef tank reads pH 8.75 without dosing high pH additives.
I would not bother bother looking for other explanations. I've been through this issue hundreds of times, one just yesterday. it , like every other one, was test error:
Should I take action? PH at 8.7
Over the weekend my PH reached an all time high of 8.75. Should I be worried and what should I do be doing to being it down? 120 gallon mixed reef Salinity 35 ppt Alk 8.0 Cal 400 Mag 1420 I dose 2 part and pH is being check by apex. I just calibrated the probe using Atlas scientific ref...www.reef2reef.com
What's the calcium reactor used and set up? Co2 lowers pH. So if your using co2 to run the reactor the ph should be lower in the chamber at all times compared to the system. Increasing the co2 flow drives ph down, melting the rock inside.I guess I can do an ICP test to find out what they see.
So my probes and my Hanna checkers are both incorrect since they are reporting the same numbers?
ICP does not test for pH or Alk.I guess I can do an ICP test to find out what they see.