CO2 / PH

zigis · Mar 20, 2009

Will adding CO2 raise or lower my ph

Ozymandias · Mar 20, 2009

usually it lowers PH

AshK · Mar 20, 2009

This is a great link which explains about pH, CO2, hardness and such:

http://www.aquariaplants.com/waterchemistry.htm

KarlTh · Mar 20, 2009

Always it lowers pH, by the same amount for a given concentration of CO2.

zigis · Mar 20, 2009

Thank you for the link.

jpappy789 · Mar 20, 2009

KarlTh said:
Always it lowers pH, by the same amount for a given concentration of CO2.

yep.

KarlTh · Mar 21, 2009

Actually, I think that short of a drop checker the pH drop achieved is the most accurate method for estimating CO2 concentrations.

Fishy_Fun · Mar 21, 2009

You can always add some crushed coral to the filter or mix in some baking soda if your water becomes to acidic.