Hi all, I'm growing 5 autos: 3 white widows, 2 super lemon haze, in coco under leds and cfl using house & garden nutes ph'd to 5.8. Was at about 350-400ppm 0.5 (~500ppm 0.7) when shit started going downhill. Using tap water 115ppm 0.5 (~150ppm 0.7). Problems started about 12 days after popped, pics are from today- 21 days. Started as rust spots on lower leaves of WW1, some in middle more towards edges and serrations. WW3 followed, but with weird necrotic grey/brown color faded patch in middle of lowest leaves. All 3 WWs have brown spotting with slight lightening in between veins. Some down turned browning tips. Some purpling of bigger leaf stems. Spots starting on newer leaves a bit. The first and worst WW has skinny newer leaves with some discloured tips. SLHs are o.k...a few small brown spots on one of them. Reckon all their growths have slowed since problems started. Idk what the fk is going on. My inexperienced eye can't match it to a deficiency... I was feeding a tiny bit of cal/mag with my feeds...like 1/10 dose. Gave them 1/4 dose when spots started then decided could be doing harm as lots of cal in tap water and coco nutes...maybe too much cal locking other stuff out? haha i really dunno I flushed a few days ago...feeding low right now. Please take a look and tell me what ya think, thanks.