Quote Originally Posted by Rusty Trichome
Runoff ph indicates the interraction between soil ph and water ph, and yes...it is an invaluable indicator. Nutrient uptake is limited on the outside edges of our ph. Lockouts will occur.
What Rusty is trying to say is shown in this handy PH nute uptake chart from the charts and graphs section of the problems section of the growing section. Glad you're back on track.