What is the function behind these PH fluctuations?

[Court_Appointed_Hypeman]

I originally ammended this the other day when it happened for the 2nd day to a thread I started in the new to saltwater forum because I was fascinated with watching my PH changes, but here has not yet been a response on it.

I figured this is chemistry related regaurdless of if there is a biological function at play here, so i will try here.

4 days ago around midnight, these small fluctiations up and down in ph started. I am very curious as to what the mechanism might be.

Sump light kicks on and display kicks off at 10:30. I monitored electrical usage and there is no known change between 10:30 PM and 10:30 AM not just on the equarium equipment, but also that circuit in the house.

What might be at play here?

 

[Court_Appointed_Hypeman]

Ah shoot, i just realized the corelation with temp, i take it I might need to check my heater for electrical interference. Uh oh

 

[Randy Holmes-Farley Verified Community Expert]

I cannot see the time scale on the bottom. Maybe it’s just my phone?

 

[Jared Bryant]

ATO running? Any dosing?

 

[Gtinnel]

I cannot see the time scale on the bottom. Maybe it’s just my phone?

It seems to be the same as the scale on the temp above it with each vertical line being the start of a new day.

 

[Gtinnel]

I get little tiny spikes in my pH from my alk dosing being in the same general area as the pH probe.

 

[Court_Appointed_Hypeman]

I should have specified, no dosing, tank is 10 days into first diatom bloom, only approaching the 2 month mark.

Top graph is temp, bottom is PH, each line is 1 day on the 00:00 mark

 

[Randy Holmes-Farley Verified Community Expert]

If you are talking about the tiny ripples between the 9th and the 11th, those might be a true temp effect (temp both alters actual pH of seawater and messes with pH measurement), but it might also be electrical interference from the heaters.