Quote Originally Posted by Rusty Trichome
Canoeing of the leaves is an indication that your ph is off. (the lower fans are canoeing, pix 3) The yellowing of the leaves above the canoeing leaves is the nutrient lockout as a direct result of the ph problem, and adding nutrients won't help. Perhaps after you get the ph figured-out, you can spray them with a weak (1/4 strength) solution of your nutes.

You'll need to adjust the ph of your water, flush well, and try to find a nutrient schedule that allows one or two feedings a week, rather than daily. And yes...there may be an underwatering problem here, too.

If they've been in the same soil for months, it may not be able to retain moisture. Adding 1 tsp of non-antibiotic dishsoap per gallon of properly ph'd water, will help to act as a surfactant* and allow better absorption. One treatment is all that is usually necessary. Also, sitting in the same soil that long can deplete the lime in the soil, which will add to existing ph issues.
Whoa! I am stoked I got some big guns like RT to help me out. Thanks for the advice about the pH issues. I am pretty confident that my pH is right, but I will go get some different calibration solution to make sure. Is there any way that it could be caused by something else? On a side note, why is that called canoeing? I always thought of it as clawing. Heh, I've never seen a canoe like that before.

After the flush, I feel as though there was a big improvement. I've taken some pictures and maybe you could tell me what'd you do differently.

As for your advice on feeding, I wasn't sure what you meant by try a different schedule. I am using General Hydroponics Flora series (GENERAL HYDROPONICS). Where might I find a different schedule to try?

Thanks for you help!

PS. Would what you said about using a surfactant apply to my use of perlite/hydroton in a Hempy bucket?