Smallish problem, could just be me

So I recently acquired two clones from a local medical dispensary and after about two days, the biggest one of the two showed curling leaves at the very top. I read up and saw that this may be due to over-watering, but I haven't watered it more than once in a week (which is about how long I've had it) or due to transplant shock.

As well as the curling leaves, I noticed a purple hue to the very bottom leaves. Not sure if this is because of the strain or a deficiency, but it IS a Bubba Kush clone (indica) and the ENTIRE stem and stalk system is purple as well. So it could just be the strain, but I figured I'd check on this as well.

The setup is organic, currently in Farm Fox Light Warrior, no nutes, under a 104-110w flor at 20-4 schedule, and the temps stay at around 69-74 degrees throughout the day.

I am just trying to take a cautionary approach more than an over-concerned one. Figured a second (or more) opinion would be good, just to settle my thoughts.

Anyone...? The problem is getting slightly worse and I'm wondering if it's a magnesium deficiency...

Don't chase anything yet! How did it look when you got it home? What did you water it with, how much how often?
Was it rooted when you got it? Is it rooted now? if it's rooted it should grow out fine.

the 2nd pic is showing sign of mg but i cant see cleary enough to say it is mg but if it magesium the leaf gose yellow'e startin inbetween vains and the the whole outside will go yellow while the vain remains green the leaf then gets black or brown spots then it drys up and curls up then dies. the way i wud treat it is buy some canna magesium and put 1ml per 1lt and spray it on the leaves when the light gose out and you can mix it wiv water and hand feed it but be carefull cause it can lead to other probs. the purple on the stem i wudnt worry to much about it i always have that on my cuttins and as the plant gets biger it gose away i dont know why it gose purple some guys on here mite help you out with that. when u start treating it it will take about 4-5 or a week to start seeing improvements.

good look!

epsom salt treat mg cheap way of treating it but i dont know hw much to use.

whitrhino can the purple cause any problems to the plant???