- Joined
- Jun 27, 2020
- Messages
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- Reaction score
- 134
Hi everyone,
I am in hobby around 8 years but pretty new to apex neptune systems. So, just got my set including ph, orp, salinity and temp probe.
For salinity probe I used @Randy Holmes-Farley condutivity calibration solution by table salt. Which is supposed to be 53 ms/cm S:35. I let the solution stay in a tank for a while to set temperature at 77F as tank. After calibrating, the salinity probe reads the solution 34.9 PPT which i think not bad!
But when I place probe in to tank( slightly shaking to not have air bubbles) , it reads 31.7 ppt. When I check with refractometer I can see my tank has 33 PPT.
So which one should I trust in this case?
I am in hobby around 8 years but pretty new to apex neptune systems. So, just got my set including ph, orp, salinity and temp probe.
For salinity probe I used @Randy Holmes-Farley condutivity calibration solution by table salt. Which is supposed to be 53 ms/cm S:35. I let the solution stay in a tank for a while to set temperature at 77F as tank. After calibrating, the salinity probe reads the solution 34.9 PPT which i think not bad!
But when I place probe in to tank( slightly shaking to not have air bubbles) , it reads 31.7 ppt. When I check with refractometer I can see my tank has 33 PPT.
So which one should I trust in this case?