01-21-2014, 03:38 PM
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Originally Posted by sandybottom
carlos,earlier you mentioned that you had a smaller plant grow out tank with a ph of 7.2 or so? what is the ph in that tank now?what are the main differences between that tank and this one other than the obvious size difference?substrate? decorations?wondering why the discrepancy between the two tanks as far as the ph values.
The tank cycling is what burning off the carbonate/bicarbonate hardness.
A 100 ppm Kh is about the very minimum to maintain a stable pH.