PH and Lights

[Treefer32]

I was playing with the reporting on my Apex Classic looking for obvious signs of trends. The compare feature is really awesome! It's one thing to have heard this before, but to see it in action is night. My light schedule correlating to my PH swings. Which, I had heard was a thing, but, looks like it's a pretty big thing.. My ph swings from 7.9 to 8.2 throughout the dayand amp_5 is my light controller. The ramp up of my lights compared to my ramp up of my ph seems to imply a direct correlation. The Yellow is my PH Probe and the green is a measure of amps from my second 8 bar.

 

[Lasse]

It is the photosynthesis from the zooxanthellae of the corals and other algae in your aquarium that affect the pH. The process consume carbon dioxide (CO2) and if the consumption is higher than production - the CO2 content in the water will be lower. The concentration of CO2 in the water affect the pH of the water, and if it will be lower than normal - pH rise. The bacteria and other living organism will produce CO2 and when the photosynthesis stop (light out) the production is higher than consumption - CO2 concentration in the water rise ->pH decline.

Sincerely Lasse

 

[Treefer32]

Very nice explanation! Thanks Lasse!