First Grow (RDWC)

The plants look nice and healthy so there isn't an issue as far as nutrients or anything. Your node spacing is really close together so moving your light up some will let them stretch some and give you better node spacing for flowering. I would move them up about 6 inches and watch them closely for a few days if they don't get further spacing then go a couple more inches. Definitely a game of trial to find the best height for each brand and model of light. Good luck!

Definetly need it for airflow or leaves will start sweating and producing condensation on them.....I went mental on my first scrog grow 8 plants 4 x 4 cut every fan leaf of week 1 and 3 of flower stretch basically just left top 2 leaves on every branch and within 5 days it looked better than ever probably stunts growth a day or 2 but its worth it for airflow and light in the long run almost forms a blanket of leaves scrog...don't go crazy if your worried just do bit by bit..your plants are super healthy so won't be an issue for instance I filled two carrier bags full of fan leaves from 1 grow and got 14 oz from 4 x 4 setup 8 plants in coco 600 watt hps all dense buds Barney's farm genetics which ain't bad would of hit 16-17 if I'd of stuck few more plants in and filled the space