Was going good but now look, help me out

I have it on an light cycle of 18on 6off with my 2 cfl's are 100 watt each 3200 lumens total and in promix soil with no added nutes yet except for whats in the soil. They were going good untill this happened. They are turning pale with orane spots on the ends of them and the 2 petals below are totally dead but have no fallen off yet. Should i pull them off ore let them stay on dead. It's on week 3 goin on 4 should i start adding 1/3 MG Water Souble Plant food. Im trying to keep it local as far as nutes so lowes is basically the only place close.

https://www.rollitup.org/marijuana-plant-problems/132382-deficency-nute-burn-diagnostic.html

http://images.google.com/imgres?imgurl=http://www.gardenscure.com/420/attachments/plant-nursery/209849d1186314471-nursery-troubleshooting-guide-nutrient_chart.gif&imgrefurl=http://www.gardenscure.com/420/nursery-reference/105126-nursery-troubleshooting-guide.html&h=335&w=600&sz=32&hl=en&start=21&um=1&usg=__F3KMhnmZITGTZH2eDhbOvR_DScE=&tbnid=IEsbmNB-iJNiPM:&tbnh=75&tbnw=135&prev=/images?q=tomato+leaf+chlorosis+picture&um=1&hl=en&sa=X

read these

i need some expert advice on this

my temps are about 65-70 and i water it when ever it needs it meaning i wait till th soil gets dry i use distalled water only.

promix timed release nutrient burn had same problem transplant and flush

yup, the spot is an very dark green that feels rough compared to the rest of it and the other leaf has small looking orange spots on them. Could it be my ph value in the water cause im gunna pick up an test kit 2morrow. Should i give it any plant food yet or let it go. It seems like it gets worse each day

its now growing 3 leaves i believe its an low rider. its still like an inch thow i wounder what strain it is? im gunna start adding nutes to it 2morow or the next day when ever it needs watering.