High All!! got a really weird problem. As of last night my leaves are lush green and very healthy. Then now 13 hours later I saw ALL of my 3 plants have crispy dry leaves on older leaves... Judging from my VERY limited experience, I narrowed down the cause to either magnesium or phosporous problem. Setup as follow: Coco coir + perlite GH Maxibloom (KISS method) ph to 5.8 Watering every other day always with nutes currently @600ppm (0.5 hanna) Individual cal-mag dosing on every watering (70 ppm cal -30 ppm mag) Flush with RO once a month 250W MH Veg phase 1 month old Temp 75-80F RH 40-50% Fan blowing Please chime in anyone with experience on this. This is a really weird stuff to me as the leaves dried up just overnight... scary.... Here are some pics to help with problem id. Thanks in advance to anyone who care to help... Cheers!!