Hey everyone, Pictures below! First post and new science nerd grower here. Some of my plants have started showing signs of some type of deficiency in new growth which I think is a sulfur deficiency but I wanted to run it by others to see if that's what's going on. Maybe this is normal when flipping or something else I haven't considered. Here are the details of the grow: -2 Amnesia Haze, 2 Big Bud, 2 chocolope -Switched into 12/12 flowering 2 weeks ago -400 W HPS about 2 feet from canopy -5 gallon fabric pots -Fox Farms Ocean Forest soil -No deficiencies occurred in veg that I noticed -Using Fox Farms Nutes. Currently feeding 30 mL of Big Bloom, 2 mL of Grow Big, and 8 mL of Tiger Bloom per gallon of water –around 1000 ppm (not deducting tap's TDS and before pH adjusting) every other watering -Watering 1/3 gallon every two days or when plants need it with Boston tap (~110 ppm out of faucet) -Foliar feeding every 7 days with Spray-N-Grow and a drop of dish soap -All water and nutrients going in soil are pH corrected to 6.2-6.8 pH -Temperature stays between 75-82 -Humidity stays between 30-60% -Good air circulation around top and bottom of plants The strain in the pictures is big bud. I've posted pics of the whole plant, a top of the plant, a healthy leaf towards the middle of the plant and an old fan leaf towards the bottom which is yellowing. I don't think it would be light burn because new shoots beneath the canopy are also yellowing. The leaves are yellowing from the center of the plants outward. Most of the edges of the leaves are still green. Another thing I've noticed is that veins are yellowing first. Contrast between newer growth and older growth is fairly obvious in person. Boston water contains 6.9 mg/L of sulfur and I don't see any sulfur or sulfur containing molecules in the analysis of all my nutrients. All of my other plants have this problem to varied degrees as well. What do you guys think?