The Hemp Goddess said:
IME, it doesn't make any difference at all if I pH my water before I flush... In fact if I am flushing for overnuting, I prefer water that is not pH'd to insure that the plant does not uptake any more nutes.
Question here for all who do not adjust ph into the 5.6 - 6.1, with 5.8 preferable range. Talking hydro here, but soil growers have near the same max and mins for their nutrient uptakes as well.
According to the charts in the sticky linked below, most of the common nutrients will be taken up by the plant at wide ranges of ph, from moderatly acid - 4.50 for Fe and Mn, to highly alkaline - 9.5 for N and Mg. What ph would be ideal to flush your plants to eliminate nutrients from any uptake?
http://www.marijuanapassion.com/forum/attachment.php?attachmentid=1833&d=1141100090
Not trying to incite a flush, non-flush here, but I understood the above charts to demonstrate that some nutes would be consumed at near most ph levels, but at much less than optimal levels outside the ideal range, and if left unchecked, the either acid, or alkaline water would prohibit the balanced and optimal usage of all essentials, thereby rendering plants with deficiencies, or over-fertilization symptoms.
Thanks for the thoughts.
Cheers.