Bigmarc420

Hey guys I’m running a few seeds under a 1000w MH bulb and one of the ladies in the back seems to be a lime green color and it is not keeping up with the others I did realize about a week ago that I forgot to poke holes in the bottom of the cup but I did that as soon as I noticed.. I was wondering if this was a toxicity or a deficiency and what would I do to correct this one