Help please

so the problems
before one ..light green on the outer area of the leaf WUT IS it???? now turning yellow real light green but the veins are dark green
1. 21 days veg, max hight 6 inches? (nice roots GOODroots for the 6in. and 5in. ladys)
2.purple stems on fan leaves and on smaller stems, starting on the third node from the bottom and going up three nodes
3.dry leaves -yellow spots and cracks looks like nute burn but only gave nute for 1 time
4.temps were high
5.water wus dirty (almost brown )
6.wind burn
wut does this stuff sound like wut do i do about the leaves and stems
ok wut do i do ineed help please and thank you..
so first my 3,, 21 day, (from-seed) old plants are at a size of 6...5..4.. inches
10g dwc 3 plants in and 4 plants in the side as backup, there like 2 inches, i started the LST on them real early so they stay small and strong if i need them.
I dont use big commerical nutes!!!? but i give them..
1.superthrive -4 drops in the res
2.water soulble acidplant food30-10-10-a pinch
3.fishemulishin 5-1-1 3 drops
4 just a small sprinkle of green light rooting hormone SMALLER THAN A PINCH
THE GOOD STUFF
nice full leaves
new groth looks good
growing everyday
strong stems and main cola
smell gets stronger everyday( wife says ok i smell somthing who has chronic) lololol
getting more supplys

my advice in summary:
clean water
accurate nutes! (measure in teaspoons?)
keep temps at 75
i've heard of purpling from the cold, but you said it was hot, so i can't say. growth may be a little stunted from slight nute burn, just be more consistent and precise. The leaves may heal themselves in time, just keep an eye out. happy growing

thank you sir
wut about the light green with dark green veins is that a lockout?
so wut do i do about teaspoon do i need as much as a teaspoon?
how do i lower temps i have a fan blown 24 and i think they got wind burn
my whole houe is like 95 rite now in front the fan

whats wind burn? if you cant find a way to lower temps, buy a used AC. read the labels and such on your nutes and this site to find out how much your plants need. nutrients are highly concentrated (especially hydro) so even small amounts can make a significant difference

how to flush with ph'd water?
DO I POUR THROUGH THE POTS AND THEN DUMP THE RES
wat temp?
wut ph?5.8?
DO I PH TO 5.8 NO MATTER WUT MY PH IS RITE NOW?
GET THE PH DOWN all at once or slowly bring PH down over days