HUGE 5 x 10 Tent Grow 2x600w Herijuana, Chem Dawg DWC / COCO grow

Hello everybody!

So im starting out by saying this is my biggest grow so far as everytime i harvest i bump it up into a bigger tent. im relaly gonna need everyone's help here with feedback and recommendations.Thanks for all those who will help!

2 600w MH
7 plant in 5 gals
3 in DWC
2 in 2 gals?

Atomic Nutrients M,G & B
CalMag
Ben.Bacteria
Ben.Fungus
NutriPlus START

PLEASE TELL ME WHAT I SHOULD BE USING IF IM MISSING ANYTHING THAT WOULD HELP.. DO I NEED SILICA?

Hey everybody so i guess were around week 3 now i just put in the other 600 watts and the plantshave def been liking it alot. its my first time using MH bulbs but im very exited to see the outcome. out big mystery plant randomly died... really random jsut droppped down liek it got wayyy over fed but it didint... anyways MY DWC ROOTS ARE OUT!!! a bunch of lilt roots all around the bottom of the net filter are showing... I WILL POST MORE PICS SOON. but please comment on my stuff i need some advice maybe some technique si should look into. so i can get more nodes on the babies. thanks again!

HEROJUANA/CHEM DAWG/OceanGrow