Leaf damage? Dtw coco

Ok was in a hurry but got a better pic. Learning to act early and this means something for sure.

So the bigger plants are a week potted earlier and thus is rootbound to point that its giving me drip issues. Its really because the pots are too full of coco but just a note I dont this the others have the same root system density.

Took a closer look at the other clones I dont see this burning. Just the very tips which I heard is the perfect balance of pushing it good but not too far.

About to test runoff if its higher than there ya go.

Inflow 1.8ec, runoff 2.3ec I need to lower it about .3ec I originally thought and turned out to be about right. What yall think? Lowering to 1.5ec or should I do 1.3ec? I think 1.5.

Edit See Im starting to figuring it out! Dtw coco is pretty easy only a few boxes to check to dignose issues. To where even I can start to figure it out.

Theres members that discurage checking runoff but I had to last couple times to figure it out. Now do you think they were overfed from the start that maybe I was just few points too high?

Out of anxiousness not waiting to see if 1.5ec is enough? Or was it good, because they looked great and still do aside from two clones which are bigger. A week older. The rest dont have this but could be catching it soon enough.