New Apex and PH probe

[USMA36]

is it normal for an Apex PH probe to be this steady? The first couple days it was up and down a lot. I realized my house was sealed up too tight and co2 may be affecting the ph. I turned my hvac fan to circulate and now the ph hasn't budged in hours. Is this how it's supposed to be? I figured it would fluctuate more similar to the temp probe.

 

[jwshiver]

Something doesn't look right with that. Mine goes up and down with the light on/off cycle which is normal.

 

[jwshiver]

Or if I get a snail stuck in the volute of my skimmer it will level off. Make sure nothing is clogging your skimmer. Another cause could be high power cable interference like lighting for example. Make sure the probe wire is not laying on any high power cords.

 

[USMA36]

Mine goes down with the light cycle too. It just stays incredibly even all day.