CO2 & PH

[-gb-]

my CO2 tank is almost empty and needs to be refilled. My aquarium will be without CO2 for about 9 hours while I get the tank refilled. Should I expect my PH to fluxgate much in that time?

My PH is currently 7.0
KH=6
CO2 is 18 milligrams/liter

thanks,

[Dissident]

Not enough to cause any problems.

[-gb-]

thanks Dissident

I won't worry about it...

[BIGFOOT]

I have ran a plant tank before. Not a Discus plant butt a plant none the same.
I will differ from what others have and yes it will. It will revert back to what ever pH you had before you started to inject co2. In 9 hours or less depending on how much circulation.

[Dissident]

CO2 is off for more than 9 hours at night... then CO2 goes on, same difference it wont cause any problems espically if ppm is at 18ppm vs 30ppm. My planted tanks go from ~5ppm - ~30ppm CO2 every morning and ~7ph - ~6.5ph in the course of 3hours every morning (with discus).

[-gb-]

Thanks everyone,

I unhooked my CO2 tank this morning. I’ll have it back up and running tonight after work. I will let you all know what the change in PH is. I did turn off the light hoping that this will help slow the PH climbing due to my plants depleting the remaining CO2.

[-gb-]

Hooked my CO2 back up after only 5 hours. The PH drifted from 6.94 too 7.05 Not much at all.

Thanks for the advice.