Calculator
CO2 PPM from KH + pH
Calculate dissolved CO2 ppm in a planted aquarium from KH (degrees of carbonate hardness) and pH. Target 25-30 ppm for high-light planted tanks.
Inputs
Enter values + click Calculate.
How it works
Step 1Formula: CO2 (ppm) = 12.839 x KH x 10^(6.37-pH)
Step 2Target: 25-30 ppm with high light + lean ferts
Step 3Below 15 ppm = pearling stops + algae bloom risk