So do you mean you use the change in pH to tell you how much co2 is needed? I had my Co2 controlled by a Milwaukee pH Controller and I didn't like the results, does a method like that result in less Co2 or is it entirely plant dependent?
CO2 drops PH..
so i start my tanks with a 0.8 PH drop of co2 injection and adjust the co2 level from there
generally my tank take a 1.2-1.4 ph drop to have sufficient co2 levels.
I have lots of light
co2 levels are really determined by the plants, if they are growin properly for their light level. then you are sufficient. if leaves are curly, discolored, stunted in size, etc but you know you have enough nutrients, then this is co2