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Why does pH fluctuate in water?


Well-Known Member
Why does ph change after some hours when you use pH up or down?

Should. It be re-corrected again? I just prepare 20l of water with fertiliser and correct pH. Should I fix the pH everytime? Why does. It change?


Member of the Month: Mar 2019 - Grow Journal of the Month: Jan 2020, Aug 2021
the surface of the water picks up and reacts to the co2 in the air. Keep it sealed and the pH will stay more stable. If you are dealing with non filtered water, the acids used to correct the pH continue to react against some of the solids in the water, changing the pH as the amount of acid goes down and some of the particulates get broken down too.


Grow Journal of the Month: Mar 2020
Or when recirculating, it can be caused by ionization betwen plant roots and solution, as well as plants up-taking various nutrients from the solution.
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