I have read the term "good CO2" lots and lots of times, but it doesn't really mean anything to me. Could you please describe and enlarge on what the definition of good CO2 is and how to achieve it. I'm new to CO2, learning, but still new. And like all things new, sometimes they can seem over complicated and a higher hurdle imagined than what in fact it actually is. An explanation of the term good CO2 will assist me and I'm sure many others.
I'm not really sure what it means without context either
Folks often just do not bother to put the other elements into context. I often make the mistake that they do, nope, not everyone, no way
That includes my own self
So no one is immune.
I'd say CO2 is the most controversial things in the hobby, kills more fish, causes more algae and generally can be a real PITA.
I think it is rather hard to suggest a particular level of concentration without also considering light intensity.
Problem is, there are no good hobby level ways of standardization for plants.
Folks come up with all sorts of methods, equations, charts etc, all in effort to improve the watts/gallon rule, various light efficiencies differences etc, by the time you do all that, you are really just getting to a very rough estimate anyway.
So relating light, which drives CO2 uptake(no way around this one), to a good CO2 ppm level is tough.
And that does not even include plant biomass difference between tanks
So, what do I suggest here?
A bit of two things, watch the plants and learn them well.
And use good measurement methods.
Plants are the ultimate "test".
I manipulate things, get excellent plant growth, then ..............I go back and see what drives that growth, see what and why the plants did well under those conditions.
Many assume that some pre concluded ppm or level is "best" and do not bother to define what is "best".
It really depends one your goal.
I know what level of CO2 ppm for at least dozen or so plants is maximum, at the highest or very high light, about 30ppm, but other species might grow better at 40ppm etc.
Of course with low light, and non CO2 methods, 1-3ppm is fine, but you have slow growth and competition amongst species(and algae) for the little CO2.
Simple question, not a simple answer.