i had same with MG as it was too hot, 5 i had like this I transplanted into dwc and now they are starting to grow, only took 3 days to get dark green after putting in dwc under HID
you can see in my pic after 2 weeks the two in back corner are same age as the rest of the plants. They are in MG while the rest are in a soiless mix and I have just started nutes after 2 weeks and 3rd node