I'm finding that i need to cut the dose back mid flower or she starts to develop some tip burn. I've got Nirvana's Ak48 growing at the moment 3 weeks into flower with a little nute burn starting on the tips of the leaves. Here is my setup 600watt HPS in 4x4 closet Canna Coco a+b 3.5ml / gal rhizo 2ml zyme 5ml GH koolbloom 3.5ml calmag 2ml ppm 655, this seems like low end of nute levels but every grow every grow has started to show some burn at this point, any pointers??