is it lock out or a deficiancy, plese help.

This is my first grow and am lost as to what to do,im near panicking.
These are my two girls. they are bag seeds,and They are 3 weeks into flowering and are showing signs of some problems, but i dont know what problem it might be.
They are in Miracle Grow Organic soil and I Just last night started folar feeding them a Kelp and a small amount of Molasses mix.
I know my ph is off bad but dont know how to fix it.
I tested my runoff water with a fresh water aquarium ph tester, the kind with the drops you mix with a water sample and it showed up to be in the yellow witch is 6.0 on my color card.
at the moment im limited on what to give my plants for food and all.
All i have is some worm castings, a bit of kelp,epsom salt,and some molasses ( unsulphured )
I also have some SuperThrive and some Sure Grow.
I was thinking of getting some garden lime if that would help them.
Im trying to keep it organic and im on a bit of a budget.
my temps are 85 during the day and drop down to around 70 at night, im watering with distilled water once a week,my lights are T5 full spectrum fluorescents.
What ever it is its spreading fast.
I was thinking of maybe giving them a bit of some garden lime but im not sure.
If any one can help I would be very grateful.
Thank You.

they r looking good but a little stretchy. anyway to add some more light?
the pics u posted resemble a K deficiency, or possibly mg or both. the molasses and epsom salts will work. but I would not be foliar feeding them at this point. u want to be careful and not feedem too much N at this point as well, I.e the worm casing and Sure Grow, maybe just a little.
as for the ph, fine dolomite lime or hydrated lime will work best-they will keep your ph buffered around 7 and provide some extra ca and mg as well. can be found at home depot or lowes for $3 a bag.

I have herd that distilled water is not good its to clean. If filtered water isnt an option. Then tap water is good if you let it sit overnight and even better if you toss in a airstone

I noticed a little bit of tip burn in that leaf in the second pic which would indicate too much fert. Overall though, your plants look healthy if not a bit stretched. If you've been using nutes lately, go a few waterings without and see how things progess.

Im going to buy some lime tomarow.
How much lime should i give them?

about a cup mixed into the top layer of soil should do it

Looks like your lacking nutes, especially nitrogen which will only get worse.
You can continue veg nutes for 3 or 4 weeks into flowering.
But from what you have said you heven't been giving much in the way of nutes, so it's already sucking what it can from the lower leaves.

Thanks yall, i am rely thankful for all yalls help, I gave them some lime and by the next morning they both had responded.
I think i might have a lock out but don't know what to do if that's part of the problem.
Thank you all for your great help.

looks like mg but mustnt be,did you get the kelp from the beach yourself?salt will make em look like that even cause lockout,i do organic but i let everything im going to use decompose properly for at least 6months, i'd keep away from the lime it will just stuff up the ph,you could use gypsum instead,it releases the nutrients in the soil like lime but it doesnt change ph,but you need to repot to mix it in because it wont just soak in like lime

Also im wondering if i need to flush them, How do i flush them with out drowning them?
and can i folar feed them lime?
Im rely new at this and And Have no idea what im doing, even though i read a lot on growing I still find my self confused and with a lot of questions.
Thanks every one.
I will try to get some new pics of them up some time today.

dont foliar feed lime,ive never tryed it but id imagine it would kill it, as for the flushing really depends on your drainage,you need to be careful u dont drown em from bad drainage, if u watered like you normaly do and then wait a minute and give it more,if it start coming out within a couple seconds then you got good drainage safe to flush. if it bad give the pot a few shakes,whacks,bang on the ground a bit,failing that use metal kebab skewer things or repot.
If it was me i would give it 50/50 piss/water after you flush,you need to consider what you have been eating/drinking before you try it, they pickup overnite when i do it,i dont think its just the urea/nitrogen content but the minerals,trace elements,beneficial bacteria that help it out