It's really hard to say without any details. I don't know if you damaged the roots transplanting, let them dry out too much. I don't know what the water and air temperature is. I don't know what type of system you planted them in, or even if there might be a issue with the water quality in the new system. I don't know what type of
nutrients your using, how they are mixed, and/or what the pH is. I don't know if they are in direct sunlight etc. etc. etc.. A picture would help if you can take some as well.