I am as much as a noob too, so i just wanted to share my first shitty grow and what i did wrong,thanks to RIU and good helpful people im pretty sure i got this under control.So heres my story found a seed in some purple kush and decided to try to grow it,got some organic soil, along with fox farm line up.Now you tube only gives you enough info to get by for a while.I used a 250 watt 15k metal halide (old salt water light)with to 6500 cfl.Now i used ro for water didnt check the ph nor did i check ph after addind nutes,i didnt add any Ca or Mg,no ec meter. Went 1/4 -1/2 strength on nutes and followed the schedule.If you using fox farm now and want to know what im doing now(dont have pics yet but i got some bagseed growing right now and it is taking off )im glad to help.I think i had every defficiency.