The Planted Tank Forum - View Single Post - Nitrogen deficiency or ?
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post #2 of (permalink) Old 12-06-2012, 02:36 AM
Carpe Diem
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Join Date: Nov 2011
Location: SF East Bay Area
Posts: 5,186
My first bet is the low GH, not N.
I would raise it to ~6 using baking soda (look up how much you need per gallon to go up 1). There are also several versions of GH Booster available on the web.

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