auto gandaddy purple

This is my 2nd journal. I have been growing since 08 with a couple years in between. And first time growing autos. Going for 6 autos. So as I go any input will be considered. My set up is: 4x4x80 Vivosun Vs1000 Vivosun 6" inline fan and carbon filter 5 gallon fabic pots Fox farm Happy Frog Fox...