Hey all, this is my first post, I've been lurking for a couple weeks learning how to grow and I just started about a week ago. I've built a couple boxes out of plastic containers, lined them with mylar, cut holes for fans, and hung power strips with CFLs from the top. so far it's been working great and the growth i've seen is pretty incredible (I'll probably switch to HPS for my next grow though). However last night i noticed my plants leaves were slightly yellow. today the yellowness has spread a lot more. the plant was re-potted 2 days ago because my friend had originally planted about 5 seeds in 1 pot. they were getting tangled up and fighting over light so i split them up into red solo cups until they get bigger.

Sorry the picture isn't very clear. the only camera i have is my cell phone. does anyone have any suggestions on how to make this yellowness in the leaves go away?

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