PH change and CO2

ZachG

Member
Good day, I recently got started injecting CO2 into my aquarium and has been going well for the most part. My only concern was if the fluctuations in ph might be problematic. Earlier this morning my ph was 8.2, around what it was before I started using CO2, this afternoon it had shot down to 7.2. My fish seem to have handled it fine but I still get nervous every time shut it off or turn it on.
 

The2dCour

Member
From what I understand the pH changes but not the osmotic pressure or something related to the water chemistry. Also from what I understand the 1.0 drop in pH is pretty standard.
 

toeknee

Member
pH levels normally reflect alkalinity (KH levels/carbonate hardness) which affects fish/livestock. However the increase and decrease in ph cause by CO2 does NOT affect your KH levels. So a ph swing caused by CO2 is mostly harmless. It's when your KH level swing wildly that hurts fish. Long story short it's not much to worry about.
 
  • Thread Starter

ZachG

Member
Ok thanks for lettIng me know!
 

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