the reason im asking this is because my new growth is bright green,..and im not sure if this is a nitrogen deficency or mg/cal problem,..because im just now seeing these growth stages for the first time,..my ph is right at 6.0,..got my ppm down to around 1200,and the EC is at 2.0 now,..i been flushing without epsom salts,..but adding a little hydrogen peroxide,...then ph down to 6.0,.and just flushing,..they seem to be responding as they r getting a little better looking as each day passes,...what a learning curve!,..lol... repotted sativas,..into 5 gallon.....looked at the roots,. and they all looked really healthy so far,..might just leave the indicas in the 3 gallon pots as they wont get near as tall.....cant wait till i have alot more hands on with these problems that arise in these ladies,...peace!