J
So many things. I'll keep it short since I just had to retype this.
1. cooltubes are BOSS. End of story
2. your pre-transplant pics looked like they had low nighttime temps. The purple stems are a giveaway. It slows growth but shouldn't cause any lasting damage.
3. your plants look like they haven't grown roots since they were put in. What kind of hydro system are you using? If you're using some sort of wick or shallow culture setup then that might not be a problem but if those are ebb and flow buckets or some DWC hybrid then you might have a problem with the way your hydro system's working. Buckets getting filled to different levels is kind of a big problem, especially since your taproots are so small. Either way, it's time to put a veg starter dose of nutes in. If they take off when they get fed then their roots are well started, but if they don't you have some problem with your design.
Also keep in mind hydroton doesn't hold water well. you'll have to flood more times per day with it. I'd guess six would be about good (every 2 hours) but you might need to go higher than that.
thanks for that, i was having issue with the flood and drain system i think i have solved this now, the system seems to flood ok, im flooding 6 times a day every couple of hours. The roots are now poking out the bottom of the 5 inch rockwool which is good. i have added nuts to this one. ok so a couple more questions.
1. the lights are they at the right height.
2. if the roots are not reaching the bottom can i move them down, i mean the rockwool.
3. im using canna nuts can i add anything from this to help them out.
4. im still vegging at the moment how much longer should i do that
5. i can raise the temp in the room if i need to ?
6. anything else i can do to help them out ?
sorry for a lot of questions.