yellowing transplants

ok so i just trans some little ones into veg 1st week is done and the harder strain to clone is giving me problems she is now turing yellow all others are green and healthy , do i need to give mor nutes ?flush ?i dont kmnow what to do i want to save this one for thefuture and not lose it any advice homies?

when you cloned them, did you cut all but the last two leaves from the new growth in half ?

Probably got air in the stem and no the plant is dying. Growers cut under the water to avoid air getting into the stem, there is also cloning gel for this same purpose. Just sounds like that to me without a pic or anything, sounds like the cutting is history. Another approach is to always take 3 cuttings for each 1 clone you need