Aquatic Plant Central - View Single Post - Experience with pH crashes; Do they really happen?
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Old 01-24-2007, 04:42 PM   #5 (permalink)
Salt
 
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According to some of the recent posts I read, no, there is no such thing as a pH crash... it is a myth.

What happens is a person goes to their tank and finds dead fish. They test their pH and find it's super low. So they say they had a pH crash because their KH was too low. But all that's happened is a CO2 overdose. That's what killed the fish. Had their been a higher KH, the pH wouldn't have been super low, but the fish still would have died.

That's the theory anyways.
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