Details: four plants. All using promix soil with gaia green 4-4-4 dry amendments. 600w vivosun LED (270 true watts). 2x4x5ft tent. 4" carbon filter kit. 6" fan for airflow. All auto flowers. 18 hour on and 6 hour off schedule. I usually shoot for a 7.0 ph when watering every two days. As shown in pictures there is some yellow in the leafs. I usually try to keep my tent at around 50%rh~ and my tent is usually 82 degrees F~ with the light on. This is my first ever grow and I'm curious what you guys think I should ph my water at. What temp I should shoot for. How often I should water. etc... I have one Northern lights in flower. Two Nothern lights in veg and Amesia in veg. I'm also exhausting the air out my window and I live in Canada. (legal to grow four plants in my province). I've got a busy schedule and I watch many youtube videos but I want the best advice I could get for my setup. I'm doing LST on all of my veg plants but I need help diagnosing the problems with them. All of my veg plants are in 2gal pots and my flower one is in a 5gal pot. Should I just forget about re-amending my medium since I'm using promix? or should I amend it? I'm in college and on a budget. I've calculated everything I've spent on the setup, 865$USD lol. Any comments are really appreciated! I'm trying to get the best yield but I mean I'm pretty busy. Cheers!