Conductivity / Salinity

djbetterly · 07/05/2012, 03:44 PM

Ok, I understand that I'll never get exactly the same reading between my refractometer and my apex conductivity probe. But here is my question, my apex is reading roughly 1.023 and my refractometer is reading 1.026. With that in mind, should I average them or which one should I go by? I need to do a water change, and if I go by my apex, I would adjust the salinity to be a bit higher, where as if I go by my refractometer, I'll leave it where its at.

I just need some advise please.

Thank you!

BigOldReef · 07/06/2012, 02:22 PM

Is your conductivity probe recently calibrated and do you have temperature compensation on (and adjusted) for the PM2 ?

07/05/2012, 03:44 PM	#1
djbetterly Registered Member Join Date: Jan 2012 Posts: 284	Conductivity / Salinity Ok, I understand that I'll never get exactly the same reading between my refractometer and my apex conductivity probe. But here is my question, my apex is reading roughly 1.023 and my refractometer is reading 1.026. With that in mind, should I average them or which one should I go by? I need to do a water change, and if I go by my apex, I would adjust the salinity to be a bit higher, where as if I go by my refractometer, I'll leave it where its at. I just need some advise please. Thank you!

07/06/2012, 02:22 PM	#2
BigOldReef Registered Member Join Date: May 2010 Posts: 517	Is your conductivity probe recently calibrated and do you have temperature compensation on (and adjusted) for the PM2 ? __________________ 400g Reef - Geothermal cooling. 1100g Total System Volume. Deltec Skimmer. 5' Fluidized Filter. Ozone. Finicky Apex. 25+ years of reefkeeping experience- Hence I have done it all wrong at least 3x. Current Tank Info: 400g Display Tank