Help, Please, plants are getting sick...

[GreenWeezil]

I have had things going for about 2 mos. in my dwc. The babies were doing super fantastic until may 10th they started to show signs of wilting and getting a sick look, two days later the leaves are starting to curl a little and are getting a dry feel along with yellow looking patches coming through the green. it seems to be working its way from the bottom larger leaves up. :(:(:(

general hydroponic 3 part system
plenty of light using compact flourescents
18\6 for light timer
no pests visible
water temp is 72ish
room temp is around 70
humidity between 35-45%
PH dropped about 5 days ago to about 5
raised it a little with gh ph up to about 6, this was on thursday last week

any help would be great thanks all.

[herbie the love bud]

post pics but sounds like low nitrogen

[hatch]

Say Bro, Something that might Help. OK I have been using GHP-3part for ever, I have added Cal-Mag Plus, Pure Blend Original (Grow & Bloom), Liguid Karma, Silica Blast, Hydrogaurd, Hydroplex, all from Botanicare. They have really help the general health of my Plant's, & have taken care of any Def..

[GreenWeezil]

Thanks folks, here are some pics, as we can tell I am not a photography expert, hope they come through....:wtf: