help me solve this problem.

I-have a 10plants growing in fox farm ocean forest and a couple seen to be turning yellow near the top . I ph’d the run off at 5.9-6.2, however I have been giving them tap water that ph’s around 6.8 . Do I have a cal mag deficiency or what ? I switched from synthetic to organic this run to see what’s better so does anyone have solutions ???
 

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I-have a 10plants growing in fox farm ocean forest and a couple seen to be turning yellow near the top . I ph’d the run off at 5.9-6.2, however I have been giving them tap water that ph’s around 6.8 . Do I have a cal mag deficiency or what ? I switched from synthetic to organic this run to see what’s better so does anyone have solutions ???
Do you adjust the pH to 6.8 or does it come out of the tap like that?

Have you given then anything besides plain water?
 
I-have a 10plants growing in fox farm ocean forest and a couple seen to be turning yellow near the top . I ph’d the run off at 5.9-6.2, however I have been giving them tap water that ph’s around 6.8 . Do I have a cal mag deficiency or what ? I switched from synthetic to organic this run to see what’s better so does anyone have solutions ???
How big are the pots? Looks like to me time to feed with a tea or up-pot.
 
They need fed. Ignore all the pH shit in soil, you have a microherd. Now feed your poor plants
Throw out some good feeds, I want to do a tea heard some good things about it , I’ve been looking into it . Also top dressing seems like a good idea. Thanks for informing me their starved .
 
Nice. That's perfect. I would feed them then. FFOF only lasts so long with water only. What do you plan to use for nutes? Chems or organics?
Feel like chem is easier . However I want to end the organic vs chem debate so I decided to go organic . Say for instance if I ever want to switch to chem from organic which I already have the necessary equipment for would that destroy everything ?
 
Could this be light stress related as well? Looks like the top/tallest of plants is affected the most, darker green deeper in the plant.
 
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