My first grow

Still battling issues trying to get the nutrient level right. Was seeing slow growth early in the week. I added humbldts secret a, b, golden tree, and plant enzymes (all at half the min recommended strength) for 2 waterings. I noticed some of the brach growth start to pick up, but the main stem foliage is still showing some slight burn, while the issues with the previously impacted leaves were exacerbated. I watered today with ph'd h2o only. I've continued lst and think I want to scrog on the next grow to simplify the process. Definitely want to try coco/perlite on next grow to better be able to control the nutrients.