A few Lower leaves are starting to look . Watering every 5 days or so. 6.3 ph tap water. I fed a little cal mag last watering and it seemed to slightly burn some of the new growth at the top . So i went with pure water today. Im in fox farm ocean forest. Three 268 watt draw leds from dimgogo. This image is of the new older leaf problem that surfaced in the past day or two