Please... does this look like normal yellowing? Its around the bottom leaves and looks like its working its way to the top. Only plain water has been used, ph 7.0 and now 6.5, was planning on feeding some nutes. Tues will be 7 weeks flower, strain is Haze x Skunk. I have GH 3 part nutes and Foxfarm soluble poweders, Open sesame 5-45-19, Beastie Bloomz 0-50-30 and Cha-Ching 9-50-10. If i need to feed, which one and how much? Thanks.