please help!! plant problems what is wrong !

ok so i have 3 girls! been flowering for 25 days or so all plants have same water soil and nutes . the temp light on is 80 -83 humidity is normal . everything is great with 2 of them but this one in the pics(g-bomb from big buddha) for the last 2 weeks have slowed growth ,droopy leaves, brownish tips some slight yellow... ive been using floweing nutes once a week . and watering inbetween . it is fine for the other two but im not sure if this plant doest have enough or too much nutes ? or not enough water or too much .. yesterday i gave it a good watering of pure water to see if that helps. ?ohh and i have let the soil dry to seeif it was over water and that didnt help . i have grown before using same nutes on them and it was kick ass bud .

and im using 3 125 watt cfl for light grow is 3 feet wide 2 1/2 feet deep 5 1/2 tall

all plants have been flowering for same time . here are the two healthy ones . their way ahead of the g-bomb . the little one i think is affy and the big one is super skunk from sensi seeds. you can see the crystal and mmmmmmmmmmm

come on guys !!!! wheres the answers .

god damn !! no one knows ? i thought this is a place to get answers

Check the PH of your run off, When in doubt flush em out. It doesn't look to bad as of yet ( but it can sneak up on ya. ) Just flush until you get a good PPM ( I usually flush until I get a PPM of 160ish) Once you get to propper PPM run 1 gal of ph'ed water with half dose of bloom nutes ( no additives Big Bud, Bud Candy etc.... Just base flower nutes I use Sensi a+B). It has been my expierence to ALWAYS check the PH. YOu can't go wrong if, when you start to see a deficency or Toxicity to flush it, that way you know exactly what you have to work with.