HELP! Fan leaves getting dark brown spots/curling!!

Hi everyone im super new to this and I need some advice. BTW its a CFL grow. I got 3 23w 6500k cfls on the 2 right now. I will be adding another as soon as i get paid. About a week ago I got some clones. 1 being critical plus and the other blue dreams.
When i got them I was told to transplant them soon. So i waited 2 days and transplanted them into 3 gal pots with ff ocean forest and at the time i also sprayed them with sns-217 mite spray, because they had brownish dots underneath the fan leaves. The mites went away but the leaves of the critical plus are still having issues. The blue dreams is doing much better than the critical +. BUT the blue dreams big fan leaves are still somewhat drying out. about 3 days ago i gave them a good watering about 1/2 gallon or less apiece of ff grow big and big bloom plant food. 1/2 strength of general feeding to build the tolerance. with distilled water (havent watered since) The temp is always in the mid to high 70's and i have a humidifier putting out 65 -70% humidity. I heard i need cal mag but i wont have ANY extra money for another week. IS there ANYTHING I could possibly do in the meantime to help this problem???? Ima post pictures. The baby on the left is the critical plus (super slow growth) the 2 pics to the right of the critical + are my blue dreams which is growing like
no other! Thanks for the help everyone!

Give them water. That looks like nute burn. When you transplant and add healthy soil you don't need nutes for a while. By adding it you might of made your N-P-K levels way to high even at 1/2. Water then for the next week or till they start going to a lighter yellow. and watch the new growth. Damaged leaves will stay that way. And as for cal mag? You might not need it. Unless you are using RO water then it's a must when feeding.

k thanks alot. Ill give it a try. how much should I be watering them? like half a cup or a cup or 2 cups or what? Is that whats causing the brown spots on the critical plus? The Blue Dreams doesnt have the brown spots but the tips of the leaves are curling on it and are pretty dry it seems. Also I just got a feminised "Big Bang" and a feminised "Ladyburn 1974" from greenhouse seeds. Would I be able to germinate them and then simply put them in some ocean forrest soil? or do i need rockwool? Also at the moment i dont have a PH tester but as soon as i get paid im going to get 1 and some new bulbs. possibly cal mag just to have it

Ffof is good with higher ph. And only water enoph to get the soil wet and dry out within 2 days. You should be watering every 2-3 days. You can germ in soil, soil plugs, rockwool or another method. And still plant in soil.

Thanks alot man. I appreciate all the help.