I've been keeping the PH between 5.8 to 6.1 but always go for as close to 5.8 as I can. I'm using Sensi bloom with MagiCal, Big Bud, Suggar Daddy, Root Zone, Liquid Karma, Bud Candy, and I got some samples of Bloom stuff so I added Phat Bloom and Seaweed Bloom. Maybe it's too much additives...