jumpincactus
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Hope it helped........ Lots of folks kill themselves btw trying to get their ph in hydro to stay rock solid at one reading. Here are my thoughts,,,,,, if you look at ph nutrient uptake charts for soil or dro you have optimum ranges for various macro and micro nutrient uptake. If you allow your Ph to to run the gamut from the high to low end then in theory you are covering all the bases on nutrient uptake and the plant gets everything it needs...... make sense? I would set my limits when doing a nutrient change at the low end and over the next few weeks let it climb on up to the upper limits and then with next rez change would start at the low end when setting ph. Also manipulating your Ph can be useful when you flip them to flower as you stay at the Ph range that takes up the nutrients that the plant craves in flower mode. Meaning I use different ph levels in veg than when in flower....Thanks for jumping in. The more help the better
You can also manipulate the color of some certain genetics by running acidic or alkaline depending on the strain.
See link............ http://www.growweedeasy.com/does-ph-affect-cannabis-bud-color
Play around and see if you have strains that can be color controlled with acidic or alkaline ph ranges.