Yellow stain on leave (pictures)

Hey hey !!
just spotted a small yellow stain on one of my leave. There is only one spot.
I lightly fed yesterday and the stain came after.
I suspect it might be too low ph during sprout and i bit after, but yesterday i fed with ph at about 6.5



a also notice that 2 of my 4 plants has "lazy" leaves (like the leaf with the stain, its not stiff)
any thought on what it is?

nutes.. there are enough nute in the soil to sustain a plant for at least a month or two..... no need for nutrients for the first month or two of there young life,.

Lol... stain...



and yea to shed my opinion on the matter, what he said!

above & below me lol.

oh the spot is nute splash.. you got some of the water on the leave and it stained it..

ok lol. at least its not the soil thats too nuted.
guess i should go on light feeding??