Not sure it's "artifical", our tanks are to begin with.
pH changes due to salts, eg baking soda/buffers harm fish if done rapidly.
pH changes done with CO2 gas do not.
Do a water change, say 75%, with a CO2 enriched tank, the pH will change rapidly, fish are fine.
Do not dose CO2 at night, the pH changes every 24 hours week after week, fish are fine.
Try it and test it yourself.
Many have killed fish trying to harden or soften their water too fast, too much. I know of know one that does large water changes weekly that has killed their fish due to pH changes in their tank's water vs the tap they use to refill, often this is a full unit difference.
10000's of folks do this weekly without issue.
When looking at the pH only, there is a difference when using CO2 vs salts/buffers and fish health.
Adding CO2 does not change the TDS or salt content of the water, that is what is critical as well as O2 levels for fish/critter health.
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