Yes. Go there first.Check out www.growweedeasy.com. They have information on each stage of growing.
If you water RO water and growing with led you may wanna use some calmag. Led plants like higher temps than HID plants, most tips youll find re environment will be geared towards HID. 81-83F seems to b work best with leds.
Whatever floats his boat but if he is basing his grow purely on grow guides it sorta shows he has never tried this himself.