Mg moisture control/ mj in flowering wanting to add some nute???? Help!!

What up guys im in currently in mg moisture control and my plant is or has been in flowering for about 2 weeks i believe. And i havent seen any sex yet but the growth is fine and looks good. I want to add some kind of flowering nute but not sure which one to get, so can u give me some pointers to which is good to use with that mg? I keep my water ph at 6.5-7.0
im using 1-68w 2700k cfl, 2-42w 2700k cfl, 1-25w 6500k

O and obviously in 12/12