02-03-2009, 06:36 AM
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Originally Posted by ghreed
The daily pH variations from CO2 are not a problem for the fish. What we usually interpret as a pH swing causing a problem is really a hardness swing. Fish do not adapt well to large rapid changes in the amount of dissolved solids in their water. The easiest way to detect that change is often to notice the corresponding change in PH. The change caused by CO2 does not affect the TDS so it is not a problem for the fish.
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