Leaves Yellowing

You giving them any calmag? What medium are you in?

Picture 1 and 2 are early signs of calcium deficiency. Feed a good dose of cal/mag supplement and shell be good for that. Picture 3 looks like some signs of spider mites. I'd check the undersides of ur leaves to be safe.

Since your tab water is .5 ec and the plants started to claw after feeding witch rules out nitrogen deficiency your problem is probably a magnesium deficiency Add some cal/mag to your tab water and cut the nutes back for a week and then start feeding again with a mild dose and see how she reacts Happy growing and stay safe ✌️🌱

@MadeInGermany that is ppm from source which is tap water. I have not been adding any nutrients at all because of fox farm ocean forest already has nutes. I did some bloom nutes in 2 of 5 on my last watering. Everything else has always just been tap. Just checked and it reads 250 or .5, i did not test this time just carried from last as the 202/.4

Hey buddy :-) Is your Ec really only 0.4 or do you feed with tabs and your source water is 0.4?

some deficiency that FF doesn't cover... looks like Ca or Mg, i'm forgetting the difference at moment. think that's Ca pH could be a culprit, too - it can cause any and all def and tox. So, if you have been bombing it with feed or if pH is off, back off for a while and see if the problem abates on its own. then, you can think about doing something more active with a bit more confidence.