Sick Girls -Need Help-Pics

:mad:I have a yellowing problem that starts at the bottom and middle leaf tips, then moves to the margins of the leaves(leaves curled under) while veins remain green, eventually turning the leaves a pale -white color
Some leaf stems are purple and one main stem has purple lines going down it, also stunt growth and it looks like mini leaves growing where the old ones fell off and died

First, thought it was Potas def- started using MG Tomato Food-18-18-21-no change

Next, thought it might be lockout Nitro def-Flushed 3x pot size and feed immediately after using same food 18-18-21-still no change

Added 2 tablespoons of Dol LIme to 2 pots to A) make sure soil was right or neutral B) to see if it maybe cal-Mag def -Still same =VERY FRUSTRATED

1 Soil Grow-FFOF + 10% more Perlite

2 Temp-78-80 never below 65 at night

3 Humidity-30-35%

4 Water evry 3-4 days or when soil is drying up

5 Water ph-6.5

6 Add nutes to water then ph to 6.5

7 Runoff-6.5

8 Plenty of holes in sides and bottom of pots

9 No signs of bugs

10 Use 1/4 strength nutes=(1 gallon water-1/4 teaspoon nutes)

11 Feed = water, nutes, water, nutes, etc...

12 Water to pot ratio-3/4 cup Water to 1 gallon pot or when water starts to drip out bottom

13 Using 600MH light:S5: