[APD] CO2 buffer system

["rugby_ox2002 at yahoo_co.jp" <rugby_ox2002 at yahoo_co.jp>]

Now I am thinking to adjust pH or ORP in my aquarium.
In this case, maybe, CO2 or N2 buffer system is the best,
I think.
However, I cannot find out these buffer system.
If you have information about this, I want to be taught.

Sincerely
shino

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