yellowish tips on one seedling

hey wasssup guys...im sure its not anything to stress about....im a first time indoor grower purchased about 50seeds from GHSC i finally managed to get set up anyway my seedlings are lookin really awesome however 1 of them has these yellowish tips could that be a nute problem even though the others are lookin green and healthy?

Pictures help and a little info about your setup.

as much as i know, when tips gets yellowish often its related to too much nutes. seedlings one week old, need no nutes. just water!

Hey guys thanks for responding...i'll take some fresh pics later today and upload them however i started using cfls ever since i germinated them beans which is about 13 days ago and have not yet switched to MH...i used potting soil cocopeat perlite and some dolomite lime for now no other nutes were added....the grow room has 10 400w MH HPS HIT250 fan that im using to extract and an hit200 as an air intake the room itself is about 5mx5mx3.5m high...am i on the right track?

hey rammstein thanks for responding i just germinated them beans 13days ago and they currently under cfl's - all im using now is plain water...i used potting soil perlite cocopeat and some dolomite...when is it best to switch from cfl to mh