Help, burnt tips on littles

so we have soms cbd strains going here, we had to transplant because they where reaching too much, so they are in 2 gallon smart pots, with fox farm ocean mix. I hadn't fed them any nutes yet.. well until a few moments ago because I'm starting to think they needed fed, I water with RO water. But I figured the nutrients in the soil would cover the minerals and crap lacking in the water, we have very nasty water with lots of chemicals etc. Or could this be a light too close. We are vegging at night indoors using LED lights.. which may have been too close... thoughts?
 
The first photo that little came out of the seed all holey like that we are sure why but all the cbd strains have this going on the tips of new growth...
 

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