Aquarium CO2 Calculator
Determine optimal carbon dioxide levels from pH and KH.
Water Parameters
7.0
pH
4
dKH
Note: This calculation assumes that the only source of acidity in the water is carbonic acid (from CO2). Peat, driftwood tannins, or pH-altering substrates can skew results.
Low
Optimal
High
Danger
Marker indicates current level (Max scale: 50ppm)
CO2 Reference Chart (ppm)
Click any cell to load values into calculator
Too Low (<15)
Optimal (15-30)
Caution (30-40)
Danger (>40)