Keep it simple and stick to the basics.
Grow micro bloom is enough to grow good pot.
Alot of people dont use additives. I would recomend voodoo and koolbloom dry.
Just give them what they need
This great advice except for that I personally do see a difference in weight when I use additives. YMMV.
VooDoo Juice is... just... AWESOME!!!!!!!! I can't afford it right now but when I had it it increased weight dramatically.
IT'S ALL ABOUT THE BACTERIA.
I have priahna and tarantula right now (the old powdered formula) and I can see a tiny difference in growth but i don't know if it's with what I paid.
I'm gonna pick up the new liquid formulas soon as they seem more cost effective.
Look, Big bud and Overdrive is great stuff too.
You don't need all this stuff for a great harvest but, sometimes these products are not about increasing weight but increasing resin and THC.