Hey can any one help me out over here? My stem is turning brown only a week after germination and i don't know what to do. I'm using a Hydro setup and ive used "Super-thrive during the germination process ( you wet paper towel and a lil superthrive) its now been a week and the stem us going brown. Can some please help me out. Setup: 150W HSP ( w/ reflector) & LED Grow Lights (Pics are attached) Hydro Growing Space H 60 inch x W 37 inch x D 20 inch 6 inch inline fan 6 inch carbon filter 2 inside pc fans ( 6 inch) 2 4 inchs PC inflow fan on outside is pull in fresh air Note: Type of seed :El Alquimista ( from the single seed center it was a free seed) Genotype: 30% sativa 70% Indica Harvest Time: 8/9 weeks â€“ late September Production :440-700 gr/m2 indoor/outdoor Lineage: Northern light x AK 47' Process so far: Ive been using distill water ( from walmart) Ph is 5.8 : PPM 10 ( After super-thrive been added) Can some please help me out.