The Planted Tank Forum - View Single Post - Enough co2?
Thread: Enough co2?
View Single Post
post #21 of (permalink) Old 02-24-2013, 08:23 PM
Planted Tank Guru
Hoppy's Avatar
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 19,681
Originally Posted by Darkblade48 View Post
It will be less if you have a high kH, since the bicarbonate will act as a buffer and prevent the pH from dropping too much.
No, the "buffer" isn't really a buffer. It doesn't resist pH changes. All it does is shift the pH that the water assumes with CO2 in it higher. The change in pH is the same per ppm of CO2 whatever the kH is. i.e. the ppm of CO2 needed to give you a certain pH is directly proportional to the KH of the water.

Hoppy is offline  
For the best viewing experience please update your browser to Google Chrome