First Time Grow! GG#4 Teen Clones

Currently understanding watering, the first week with teen clones completed I think I'm going to keep it at ~ 1 gallon of water every other day about. I'm using a Meizi 600w LED, in a 3x4x7' grow tent. My first grow ever! I've had these plants for 10 days now. They were bought clones as teens. Taking note I transfer them over to 5 gallon pots with mito. Then put 2 gallons of water in them, without their roots fully developed. Causing them to drown, after letting them get a lot of air circulation and dry time they bounce right up (yay coco). The third plant I have is currently really behind the 2 others in terms of growth because that one I soak a little bit more then 2 gallons. I've been starting to use training techniques like Topping, Fimming, and Low-Stress Training. They also got powdery mildew so I've been combating that with Plant Therapy by floral spray. Day 11: I've noticed them have calcium deficiency and struggling with getting them fed well. FORGOT TO PRECHARGED MY COCO, BUT WE LEARNIN. So just going to hard feed them Cal Mag till I notice the coco isn't taken it away from them anymore! Day 12: Plants have been water with about a 2.5 liters each, will continue this about every day till I do not get the same amount of runoff. Day 13: Plants watered with 2.5 Liters which creates 10% runoff Day 14: Plants are looking good, been cal mag floral spraying for a day now to see if I can get deficiencies in the plants down. I also took some high-quality shots!