Wedding Cake mainline (Norcal Farms)

Growing well. Just fed 12 cups Ph'd water (6.3). Lots of cold humid air coming in from outside, plus with the half soil half coco mix I think they're holding water a long time. They're only needing water once a week right now. They were not impressed with the water-only feeding. Some leaves got burnt tips, some got small yellow dots that look like spores or insects but I don't think are either. I think it's some kind of nutrient or pH unhappiness. I only gave 2/3 of the amount of water I normally would, hoping that they will dry out soon and I can give a proper feeding and check runoff pH. I left them alone for a couple days and boosted the 1000w back up to 100% to dry things out a bit more. The buds loved it but I think it's damaging the leaves a bit. I put it back down to 75% just now. I forgot to adjust the intake fan from outside down to low overnight from medium during the day and leaf temp was down to 13.3c when I woke up. Can't be doing that either.