If you want to keep all eight plants, then you'll have to carefully excavate them from the soil. You should be able to extract the entire plant safely if they're just a week old. Afterwards, gently transplant them into an appropriately sized pot. Also, this part is optional, but if you go to the local hydro shop you can buy some b-vitamins which help to reduce transplant stress.
In the same pot?
Option 1) Seperate them when they are as young as possible trying not to hurt the roots!
Option 2) Take your chances of them in the same pot, but its 1/2 L pot divided by 8 for root space....
Option 3) Thin them out...
I would personally go for option 1.... but thats me..
Hey I went with option 1 , I carefully seperated each plant and I believe I didn't hurt any of the roots . I made like a cross section into the soil and it was easy to transplant , I just hope they all survive .... Thank you I'll keep updating and posting pics