Originally Posted by jeffaquarius
Can you translate that in layman's language? Explain why pH increases when oxygen is high with water surface agitation?
It's more about lowering C02 concentration in the water. Dissolved C02 lowers pH. When atmospheric C02 is low, then so is the tanks C02 as it balances thru gas exchange at the surface (or skimmers). A sealed up tank or house raises C02 levels, a lot. That's why we recommend open tops that can breath. It's as much about C02, or more, than it is oxygen levels.
Oxygen is usually measured by redox potential (ORP), which indicates not so much how much oxygen is available, but the reduction or oxidizing potential of the tank water (which requires O2
). As biological process's depend on these oxidizing potentials, a high value is preferable.
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