If it's just a simple perlite/vermiculite mix, coconut coir, or clay, go with 5.8 - 6.3
If it's a mix of organic matter, ie. Peat moss and forest products then go with 6.2 - 6.7
That would be my recommendation.
Good luck to you.
I have a moster snowwhite 2 weeks to this day in flowering under a 250w hps.
She fills the 2ft x 2ft tent and stands a meter tall but doesn't look as far into budding as your one is.
What nutes are you using?
I think your snowy looks very good, i have been growing these for a year now and...
cOME ON BIG MOUTH, WHAT DO YOU HAVE TO SAY NOW?
YOU ARE PATHETIC, AS YOUR GROWS ARE TOO.
So, after all your bullshit, the correct thing to do is to make sure your plants have total darkness.
I WIN!!!