Z7 always left my rez clean with my rain water. Great white would always lay on the bottom of the rez no matter what kind of agitation I tried to keep going 24/7. I finally went with Orca which is great whites liquid to help with root development.
Yeah Joe I have a few plants that are getting too much nitrogen and some that are lacking. So I make my feeding too the schedule for the ones wanting more and I water down for the light drinkers. I've been finding that the sativa leaning strains are the lighter eaters.