No matter how much you know,you can always learn more

I decided the best way to get attention to your thread is to say something out of the ordinary in the title.anyway now that you are here I have a question.When it is time to flush,Does the ph matter?
Right now,I have 6 girls going but I am starting to think that I am underfeeding these girls.When comparing my last grow to this one,I've noticed that my buds seem to be smaller.Now I am asking myself,"What did I do different?"
I did two things different.The first thing is that I didn't use my conversion bulb because I have a 400 watt mh and I need every bit of that 400watt.When using a conversion bulb my 400watter is changed from a 400 watt White/Blue light to a 360watt Red/Orange.So this time around I decided to go with the MH bulb all the way through.Wondering now if that was a bad move.
The other thing is the amount of food I am feeding them.I will give examples with the pics below

Regenerated on 11/23
sitting @ 6.0 450ppm

6.2PH
470ppm

6.0PH
520ppm

340ppm
5.9PH

390ppm
6.0PH

Yea dude you need more nutes and u need to use HPS no metal halide. MH great 4 veg and maybe you need to veg longer. I have my PPM in between 500 and 1200 depends on the strain and my PH is 5.7-5.8. What kind of nutes are u using I use Dutch Master and i get some bushy busy plants in my DWC. Maybe use more nutes find out your plants limit and keep it in and around there.

ok,I will give this a shot

Max ppm for me veg: 650 flower 900 ph always 5.8 no matter what is going on

Hope you dont mind. Here is a couple pics of some vanilla kush I got from attitude.

Got mine at around 1100 ppm and 5.9 to 6.0

here is a update

yea my ph is DWC is always at 5.5 sometimes 5.6 . never fluctuates and my plants love it with no ill effects and im using 400 watt hps .

you need hps for flower. the ph is way too high.

help please