03-21-2014, 12:51 PM
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The drinking water must have 0 buffer to fall so rapidly to such a.low level. I don't want to sound like an expert - I'm still learning lots about water chemistry, but I do know that 5.6 pH is far from ideal for the development of biofiltration. My research says 9.0 pH is optimal for the growth of nitrifying /denitrfying bacteria. Of course we don't want THAT high ph in our tanks for the fish, but just goes to show how bad low pH is for your cycle.
I will be following this thread closely to learn from this highly unusual situation. Thank you for posting your results and please keep updating.
Best wishes for beautiful and healthy aquarium!