Dwc isn’t going to be a good choice for pheno hunting. I would do drip coco or ebb&flow with a small table as with those you could put a bunch of babies on with minimal work
LEDs are legal they’re just lights you can grow anything with them. With seeds if you’re only buying a couple law enforcement isn’t gonna be watching for that. Possibility they get picked up if international but nothing would happen to you other than losing seeds
100 percent coco should be ph 5.8-6.2. Can go down to 5.6 but I stay at 5.8-6.2. and no, do not water with plain water you have to use nutes. You're saying you're using coco soil though
I use attitude seed bank that has a bunch of breeders. I am in the US but I’m sure they ship UK as they have multiple currencies you have to choose to use one. In-house genetics and archive would be my go to breeders
I agree with coco. Soil is finicky with feeding/watering. Coco feed every watering. Sprout/clone in solo cups, transplant to 1 gallon for veg, go to 3 gallon for start of flowering
Why so many tents? If you can use the whole room have it as an open room. Multiple tents just makes managing the environments more work. If you need tents go with one big one for flower and a 4x4 for vegging
That soil looks really dry and they are under watered. I would water with food and they’ll perk up. Have to keep up with watering or they won’t grow much
No as long as they’re gone before flowering. Hit them with some Monterey garden spray and avid. For a week or 2. Swap between sprays don’t mix them together