Had high soil ph right out of the bag on last grow (FFOF) and tried to lower it gradually during grow without success. Got half a bag left and want to get ph right before I start next grow. I'm using fabric pots so do I mix soil and perlite, place in pot and flush the shit out of it with 6.0 PH'ed water until it is in right zone? Does that also flush out nutrients already in soil so that I need to start adding nutrients sooner?