Planted Tank Enthusiast
Join Date: Oct 2002
Location: Minneapolis, MN
3.6 x KH (in degrees) x 10^(7-pH) is the formula to use. Example pH=7, KH=5. 3.6 x 5 x 10 ^ (7-7) so you would have about 17 ppm CO2.
Tank in transition! 55 gallons, hard water.