What are considered stable Ph reading's

[MikeyNYC]

My Ph ranges from 8.1 to around 8.4 through the course of the day. Each day is pretty consistent in that from early morning they start out around the same level and end approx the same, would this be considered stable, or am I looking to achieve a specific level throughout the course of the day.

Edit: Which would be considered ideal?

 

[NYreefNoob]

mine stays between 8.1 and 8.3 flux's with day and night a little even though fuge light is on 24\7

 

[KathyC]

There is fluctuation in PH as the day goes on and mine runs just about the same as yours though a little higher at the end of the day before my fuge light comes on at night.
Are you running your fuge lighting on an opposite schedule than your tank lights to help keep the PH consistent?

 

[MikeyNYC]

I have a 6500k light running on my fuge for about 6hrs after the main lights go out. I'll try running them overnight, and see where Ph ends up in the morning.

There is fluctuation in PH as the day goes on and mine runs just about the same as yours though a little higher at the end of the day before my fuge light comes on at night.
Are you running your fuge lighting on an opposite schedule than your tank lights to help keep the PH consistent?

 

[KathyC]

Good. Do let us know the results of your test.

Why do you shut it off after 6 hours now?