Mixed Problems [Good Pics and Lots]

So heres the quick rundown:

Problems:
Drooping leaves(only bubblegum)
Yellowing of new growth(only SS)
Yellowing of Leaf edges(only bubbleum)
Brown spots on older leaves(only effecting bubbleum strain)
Slow vertical growth(all)


Enviroment:
65(night)-79(day)
1000 ppm GH flora Nova, Cal Mag, silica
RH: 50-55%
Floodin twice daily for 15 mins
2 20gl Res under 2 3'X3' trays
4x8 Hydrohut
2X 600w HPS
PH: 5.8-6.5


PROBLEM PLANTS:
3 Super SKunks: Yellow new growth, slow growth. (ignore the small plant to the side, put under cfl for pic)



All Bubblegums(: Drooping leaves, Rams Horns, Slow growth, "Crinkled" leaves


Super Skunks (9): Slight rams horn.. no real problem


Anthor weird factor, i have a mother closet 10 feet away with a ph i dont watch very much its usally high(6.6 or so) and any plant I remove from tent and place in there recovers quickly here a mom and a recovered plant.



Good Karma to all those that help! Sorry for the inverted pics i walk on the ceiling so its awkward..

hey man not to be a jerk or anything, but half of your pictures are turned the wrong way. hard to get a look of things. Best of luck to you

how did you walk on ceiling? anyway that bubblegum seems be a fussy strain. next time just grow the SS