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Old 02-10-2013, 11:49 AM   #6
HD Blazingwolf
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I like the ph difference for a ballpark reference before a choose drop checker at this point. Between a. 8 and 1.0 ph drop is usually sufficient for most plant needs and light intensities, once u go the high light range, more may be necessary. But ph drops are how i tune my tank in the beginning then adjust from there.
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