Just a wild guess what happened, the RO filtering was recently started. When you put low pH water with bicarbonates in buffered soil it can interact with the buffers and actually raise the soil pH. So the pH goes up and suddenly it can't take in iron in that higher pH, and you've got an iron deficiency on your hands. Now that RO water is being used, this shouldn't be an ongoing problem and grower won't need to use "Kentucky windage" when ph'ing water to figure out what you'll get when it flows through the soil because it's now RO and no bicarbonates or minerals to screw things up.
With drinking water, the purification process lowers the pH. So it's not uncommon for municipal water to have bicarbonates to raise the pH to drinking specs (7.2-7.6).
I'm using fox farms ph up and down.
So I shouldn't need to adjust anything but the ph to 6.5?
Oh. And the flushed water phed at 5.6. Maxed the ppm at 1999.
Now, checking out the spinosad, I need to use some neem oil to get rid of the aphids...
Might be light burnI'm growing in soil. Recently added a reverse osmosis for the water. Last watering was phed water. Ppm was 25. Ph at about 5.8 to 6. They were moved to large pots and week ago.
The leaves visually jump out.
I personally think its potassium lockout due to the light being too bright ,(first thing to get locked out is nitrogen so the leaves go pale then yellow down the edges)Might be light burn
you're right , light burn affects the new growth whereas potassium lockout starts lower down on the older leavesMight be light burn
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