beginner grow

For some reason I cant find my nutrient in the list but I am now here...COCO A and COCO B (20ml of each per 5L) , CAL mag I did get some starter stuff for the coco, it turns out to be mealworm shells or something equally bizarre.....hmmm, its a minefield... End of week 4. Everything was put into coco and clay pebble bags yesterday, I had some light yellowing of the leaves before transplant and wondered if it was the process of switching pots that did it. Nah, fucked up my nutrients is all, 10ml should have been 20ml p/L so I was under feeding them. I have a few thoughts though so here goes, feel free to answer or comment or message... I was told this week that coco was a medium sold to inexperienced growers, allows no flavor, doesn't hold nutrients correctly and I should think about aeroponics instead, can I take out my babies and change them to aeroponic now or should I persist with what I have, but if I do persist, should I add some soil to my coco and pebble mix? I am hand watering 500ml with feed every other day (5Gal cloth bags) or when I deem the bags to be dry enough 2-3 days.!! its chilly in there but managed to bring up the temperature a bit today with a new cellotex(similar brands are available) house inside the shipping container around the bud box, but not the door, the outcome was I used 6 sheets, one top, one bottom, one left, right, back and far right of full 8 x 4 sheets, all upright sheets cut supported off floor sheet (full width and length) and under ceiling sheet to hold it up. Figure I can get some flexible aluminum multi layer foil backed stuff to use as a drape door, its pretty quiet and off the beaten track here so not much chance of anyone nosing around, more for me to keep the heat and light in and control the environment a bit better. My bud box has a Zeus 300w led light set and now I have created a small germination/seed/ flowing room ( to the side of the bud box with the extra 1200mm of cellotex) see photos., I might put my old HID in there and use my spare fan as a remover of heat into my bud box (to bring up the temp a bit)? and out through the carbon filter. sounds like a plan, Does that make sense??? I do think and having done sone homework on it, that I do like the look of the aeroponics and will likely try this as my next attempt if I don't swap out all of what I have, it seems like a no brainer and talking to a few already, better yield, better quality product...