Gorilla Glue Autoflower ILGM

Had some troubles trying to figure out what causes burned tips, doesn't seem to be heat stress temperature been ok 70-77°F, had some issues as well lowering the RH been at 55-60's trying to get it to 40's. I was using RO water when mixing calmag and recharge, but I think I'll keep it with normal water until flushing day. Don't want to add anything else at this point since, both of them from time to time start drooping, I can't figure out the cause. I'll just water with regular pH water at 6.5, maybe some calmag if it show any signs.