Is this some type of Deficiency ???

My plants are about 11-13 weeks old (not really keeping track) not flowering them yet and i just got a 1000 watt MH a couple weeks ago. Last week i noticed this dull greyish patch at the ends of some of my leaves and some brown-grey spots on another, i'm wondering what my plants are lacking or getting too much of. And also, one of my plants has some of its leaves, mostly the bottom portion curling inward and some are almost tube like, and id like to know what i could do about that lol Im thinking its phosphorous but not sure, and i dont know what causes the leaves to curl inward.
Thanks.

you need a bigger pot. whats the ph of your water?

looks like phosphorous issues and maybe PH issue as well. Leave will tube like that with low humidity. what are temps and humidity?

from the picture I see of the pot, its way to small for that plant. Your root bound for sure, I dunno about the brown spots but that is most likely from the pot too

def ph your water, dont think its bugs.

its to big for the pot it is in and i have had root damage that has caused the leaves to curl and die and it had stunted the plant thru its hole cycle which sucked.i would suggest repot in a good sized pot and flush with ph water and start to feed again when you see the plant has recovered.

Thanks guys, yea those pictures are a little old, i transplanted them into much bigger pots the day after the pictures were taken and the roots were clumped together pretty good. Is them being in those pots so going to hurt my plants in any way?? they seem to be growing since i transplanted them, the couple i topped developed their 2 main shoots now. And there probably is a ph problem i dont have a way to measure it i need to buy one what do you suggest i do to balance the ph. As for humidity, its in my basement and it is pretty damp but i did just put in a bag down there to suck up the moisture. The one with the curling leaves is quite a bit shorter and bushier than my other plants im not sure if its stunted or if its a different plant i have a variety.

And if i do need to flush the soil how would i do that?
soak the soil til the water pours out the bottom??

Thanks alot guys.

Heres some updated pics

pet store for ph kit that should have liquid tester and ph up and ph down-