I see a lot of things going on. First & foremost, the severe burning of your leaves at the edges (to the point of drying to a light brown & turning crisp) is a major sign that the plants cannot transpire enough water. Think heat exhaustion for us in the middle of the desert, but that we don't have any sweat glands, they've closed up... we wouldn't make it very long. This is exacerbated by the nute levels, which become toxic at higher temps, i.e., you can run a much higher nute level at lower temps whereas the same nute level will burn the s*** out of them @ 82F+. The fact that all they want is water is also akin to giving us a salty margarita while suffering heat exhaustion in the middle of the desert. Much of the fluids is unavailable to us & the other shit (alcohol & salt) only dehydrate us faster. The ridges & curling of the leaves are clear indicators along with the raised, burnt, dry edges. There is likely a radical pH shift about to happen in the medium as well, if not already. The foliar spray, again, contributes to the stress on the plants, especially if applied heavy to the point of pooling along with high heat & direct light. Adding a 1000w is only making things more stressful & damaging. They are in dire straights right now (u alone in the desert with nothin but margaritas, and now the sun is reaching the highest point & u'r shade-umbrella just blew away). First, get them out of the heat. Second, flush, flush, flush & a very low nute (with LKarma @ 1ml/gal). Properly pH & keep the total ppm's no higher than 400 for the next week. Third, raise the light levels until they rebound, especially with the 1000w. Fourth, unless the populations of insects are terribly bad, don't foliar them anymore. They need help right now as there are a number of factors contributing to their current condition. Critical care. Best (I'm not being harsh, just no easy explanation).
