ignore the blotches of different color - that's not nute-related.
However, the burnt serated tips are a sign of some unhappiness. Unfortunately more than one nthing is possible to cause this... P-tox, K-tox or deficiency (funny, huh?), S-tox...
grow mix? any idea of what ratio and concentration of nutes it added? this would help a lot. Easy to rule out pH... test it.. (though do realize this is as much art as anythign else... what runs out the bottom of the pot is not exactly representative of what the pot's pH is.)
but, if you irrigate and fertigate at the right pH it should be fine.
just in case.. do allow some minimum wet-dry cycle to occur before watering entire volume of the pot.. never water a portion. this makes the top wetter than the bottom and you promote superficail roots as well as creating a disaease vector as well as pest vector. let top layer dry.. if coco just let it change color.. if soil, let 1/2-1" dry before irrigating again.
Not knowing if soills or soil makes a big difference in what you specifically do day-to-day, but over time they both have to average out to match plant metabolism. soilless/hydro is much easier to diagnose because you *can know exactly what you have given to the plant in regard to nutes... there is no unknown unless too lazy to track it, which would be a self-inflicted choice.