ideally, ph should drift over range wherein plants can assimilate different nutes @ different ph's. this is cation exchange capacity, or ability of electrical charges to permeate various barriers.
gh flora nova will keep it buffered in the range of 6.0-6.3. can always go up or down to permit certain nutes in @ certain times.
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Last edited by *mistress*; 09-19-2010 at 04:53 AM..