That's absolutely right Rayishungry! Building up density is key to dense bud growth when growing in such an enclosed space. But Indicas make it possible to do this. Ironically, your post reminded me to raise the lights a little since this is the phase in the flowering when the central colas have to grow and differentiate themselves from the other tops.
Also! I just lollipopped the girls, which I HIGHLY recommend every DWC grower do if you don't already
hello nutrient boost
Pa Pow] 
The Mazari at the back right is starting to pistillate nicely with tops all over, while the Mazari in front is still growing its first few, and The Church last at far left it still firming up its budding spots. About where I expect to be at this point. Enjoy the Pics 
I keep my ph at about 6.5, doesn't need much adjusting though
If we're talking hydro my say is 5.5-6.5 is optimal
, also rootage and nutes add a kind of acidity over time if you don't flush very often 
. What exactly was wrong with your flowering? Thank you Mr. Cheese! For real, I am waiting for that girl to finish just so I can say "It's time for Church!"
Yeah that's a good range, but in water 5.8 is the perfect number. People that use a range are people that have PH swings.. keep that in mind.If we're talking hydro my say is 5.5-6.5 is optimal
It's down in the science where the real magic lies 
Oh man, well follow this link and find the exact deficiency
Hope it helps . Its ph fluctuation that gets you. Too much of that and your girls will be all like 
and lock you out. Stresses your plants 
But if it gets too bad just go the ol' Roseman route: flush with ph safe water and slowly retrain them to handle nutrients and all will be well 
. Plastic cups serve as an easy fix 
