GDP and Green Crack 400w GROW

Alright, the grow box is finished since yesterday, and we're on our way!

Specs:
-Grow tent dimensions are 6.5 ft x 2.5 ft x 2.5 ft
-Running 5 small pc intake fans
-One 4''exhaust fan
-400 watt hps light, about 2 feet away from plants
-18/6 light schedule
-Ocean forest ffm soil
-FF nute system, Grow big, big blood, and tiger bloom
-Temps so far, during the day up to 77-80F
-Humidity 50-55

And of course pH'd water

So that about covers it I think. Just got the clones two days ago.. I'd say their about 2 weeks old? Not really sure. We're doing Green Crack and Granddady Purp this time And thinking about trying a few more advanced techniques so stay tuned!

going pretty good so far.. the plants look like they've grow already! the GC one looks taller for sure. a few pictures of them, the lights just came back on 20 minutes ago

so heres some updated pics, day 4 now.. doing really well. the GC is getting taller everyday, its awsome

well the green crack has absolutely shot up compared to the GDP.. I think its because the gdp was put into flower and now taking some time to go back into veg. I super cropped them both this morning, and I also did it a few days ago.. (squished the stems to promote lower branch growth) and it looks like its going great so far. also tried to fim, but im not sure if i did it correctly. if not, im just gonna top them in a few days.

I thought i should update on the two plants..
The green crack is getting suuuper bushy now, im thinking that i need to lower it a bit away from the light because its started to get close. the gdp is growing much more slowly though. some of the leaves are also turing more yellow. im treating both plants more or less the same. today i watered them and it was the first time i have checked the run-off water of the plants. to my surprise it was 5.0 or lower!! ive been ph'ing every watering, and am wondering why the ph is so low...? Im not sure how to fix this except to flush.. so thats what i will do in the next few days.
heres some updated pics of the girls that i just took this morning

but heres the girls at about 6 weeks..

a few of the pictures are last week, and some of them i took yesterday