Is this too value fluctuate for SPS?

[taowa]

Just want to know the following value from Neptune is too fluctuate for SPS or not.

All values are within 1 day
Salinity : Minimum: 31.5 Average: 31.81 Maximum: 32.1
ORP : Minimum: 325 Average: 356.55 Maximum: 367
PH : Minimum: 8.19 Average: 8.27 Maximum: 8.38
Temp (c) : Minimum: 24.3 Average: 24.95 Maximum: 25.5

 

[Coralmassa]

Salinity fluctuations would be the most important factor to control.. Do you have an ato? Ph swings are normal from night to day. I've never measured orp in my tank but I use a temp controller to keep my temp between 78.3 and 78.9. There are many who have larger swings throughout the year as ambient temp changes.

 

[twon8]

You should be fine with those swings, but I don't see your alkalinity, which is the most important a parameter IMO


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[MichaelW]

If those are accurate (recently calibrated) I would say your salinity is low. 35ppt is a more common target. However the apex salinity/ conductivity probe is notorious for giving strange readings at times, air bubbles etc cause it to read strange. For example my probe was reading 35ppt.. I made a water change with correct salinity water, probe now reads 47ppt. This happens everytime after about 3 days it usually reads 35 again.