First True Leaves Are Dying

Hi, this is my second grow and im focusing on just a single Sour Diesel seed and my plants first true leaves are dying off and just about a week and a half ago the seedling looked young and healthy. Here are pictures to show the comparison between weeks. I messed up by giving it nutes when it was very young and im thinking this is cause of a possible overdose.... Ive cut out the nutes and now im giving it only fresh water when it needs it.
Any other suggestions are more than welcome thank you.

no nutes for the first 3- 4 weeks and then start 1/4 strength and build up weekly.
dont worry it will all come good.

Don't give your seedling any nutes just superthrive add 1 drop per ltr and put into the propagator leave in propagator for at least 2 more week spray the lid and leaves first thing in morning last thing at night have your light but not to0 near 3cm away if flouresents or cfl's.

GoldenGanja13 said:

If those are from seed they do not need to be in a dome, they need fresh air, and watch the lights. If you are useing a Mh keep them on the outside of light not directly underneath.

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They are not in a dome they are in my closet and theres alot of air coming in and out. I am also using CFLS but not very strong ones. And they are also in the correct spectrum. Thank you for your input and ill keep my fingers crossed for some healthy growth