Need help with sick plant please!!!

not sure what’s going on with this plant it was a clone that I pulled out of early flower came back to life after a struggle then seemed to show signs of this after transplant or shortly there after.This is only my second grow and I’m having a hard time identifying if it’s a deficiency or what most deficiency’s seem to have the same symptoms lol I have five others in the same soil ffof , same cloning process,watering same everything. Three gal grow bag transplanted from 1gal pot with great white sprinkled in the hole .Topped with diatomaceous earth and mixed into top layer of soil because I saw a few gnats.They get watered when dry a inch or two below soil with ph 6.5 water.They are currently under a 220 or so watt hlg 550 v2 with about two feet of space between the plant and light if not more in a 5by2 space. The specific symptoms are very light or bright yellows leaves that seem to green vein and eventually turn a normal shade and slower growth. Any help would be greatly appreciated tryn to keep it organic if possible as well
 

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