1st plant. Seems stunned and yellowish with black dots tips. Can anyone give a hint?

That's more likely tox than deficiency. Nute burn. So, back off on feeding and see how it reacts. Always the safer route. Can always add, but can't take out. don't worry about other diaries. Always react to the plant. Other diaries can give you a good starting point at best. Other things to check, but i am assuming are okay: pH can cause any and all problems possible and your own recent behviour might make what i say abjectly retarded :P and that's... okay. Regardless, it's not too bad. It'll quickly snap out of it.