Haven't been on in awhile I was setting up and dry running my upgraded setup. It's a spider farmer SF2000 kit with an additional carbon filter duct fan blower in clean cool air. Hm is between 60% and 67 max, 79°F. I've only fed with nutrients once so far mix of 1 gallon ro water 3 mil cal mag and 1 1/2 ml of grow big. I do regular watering with ro and 3ml cal mag. Lights are 20 on 4 off power at 60% at about 30 in away. It's I'm wondering if I should trim a bit? I've never grown this Sativa strain (Purple Alien) before. I think it looks good but notice some possible nutrient burn. Sorry for the flapping, any advice is absolutely appreciated and welcome. Thanks guys.