Hi I think I have a mag deficiency but I'm not entirely sure I need some advice, I am 5 weeks from seed, using a Wilma system, 2 air stones in res, coco with clay balls in the bottom, hesi nutrients ec 0.8, tap water 0.4 ec, set pH in res to 5.7 let it drift up to 6/6.1, res temps 19/20, air...