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CO2 Dosing Calculator
Estimate your dissolved CO2 concentration from water hardness (KH) and pH, and get a rough bubble rate to aim for in your planted tank.
Formula: COโ (ppm) = 3 ร KH ร 10โฝโทโปแตแดดโพ. In low-KH tanks (soft water) even a small pH swing means a lot of COโ, so test often when the tank is lightly buffered.
Dissolved COโ
COโ Concentration
12 ppm
Suggested Bubble Rate
โ
per second, rough estimate
Too low for plants
0153050+
Add more CO2 or extend injection hours โ plants will grow slowly.
Bubble rate is a rough guide only โ every diffuser and tank is different. Use a drop checker for real confirmation.
Related Reading
Guides that cover this topic in depth