Lighter spots om lower young leaves

[Waira]

.... and keep watching the tops/newest growth of the rest of the plants,.. that fade looks a lot like Fe defc. starting,... check the soil pH to see if it's getting alkaline in there (near 7.0 or higher),...

 

[doktoren86]

.... and keep watching the tops/newest growth of the rest of the plants,.. that fade looks a lot like Fe defc. starting,... check the soil pH to see if it's getting alkaline in there (near 7.0 or higher),...

I will try to measure the PH of the runoff water in a few days.
I have been giving it PH adjusted water, but I'm currently using the drop test and I try to hit 6.5
My electronic PH meter should arrive later this week.