What do you guys think?

[Biffdoggie]

I've got somethin' weird going on here. it looks a little like nitrogen def. and a little like zinc def. I'm using ebb and flow buckets with hydroton for medium, PH 6.0, GH flora-nova bloom and GH kool-bloom @ 900PPM (1550 recommended), higest temp 85F, lowest 70F, humidity between 40 and 60% and currently in week three of flower on 12/12. Good ventilation in the room and I have this on about 6 or 7 of them and mainly on the lower parts of the plant.

http://img429.imageshack.us/img429/8597/dscf62427pt.jpg (http://imageshack.us)

http://img419.imageshack.us/img419/8393/dscf62430xr.jpg (http://imageshack.us)

http://img429.imageshack.us/img429/7471/dscf62457bt.jpg (http://imageshack.us)

[skunk]

im not a hydro spec. but if your in your 3rd week of flowering and its the lower leaves looks to me to be natural as long as its not in veg. and then again it could be a potasium def.

[Biffdoggie]

Yeah, it turned out the Bubblegum just yellows dramatically compared to the Sweet-tooth, I just wasn't used to it, they are almost done with flower now, have yellowed through the whole thing with no problems.