Sup guys, so im heading towards week 7 here of flower, and for the past 3 weeks this burn has been taking over my leafs, slowly spreading, mostly on the top of the canopy. My temps are anywhere from 72F to 82F, at hottest hours of the day, water temp 70-72f, using aqua canna, a pretty mild solution, ppm750-800, ph usually around 5.8, hasnt really gone up above 5.9 since i switched to flower, so im beginning to think that i might be locking out nutrients, probably MG def, so i thought i might wanna try to leave my ph a bit higher, adjust it to maybe 6.0-6.1 for the remaining of flower. What do you guys think? Any help is appreciated.