Salt burn? Light burn?

As the title says got an auto on that has bad yellow tips and praying leaves. (Pic below) Thought light stress/burn initially so checked light levels (was around 30 DLI) but still turned the light down because I thought the plant may be too close to it. Leaves were still pointing up the day after turning the lights down.

The other issue is leaf tips are yellow. I have been trying to self diagnose trying a few things but no joy so far.

I've cut the feed to around 1ec incase it was anything to do with too high of ec levels for this certain plant ( the other 2 are under same light and on same feed and don't have these symptoms)

The yellow leaf tips are telling you that the plant is getting a slight overdose of nutes. Go lighter on the nutes. Other than that, your plants are looking good.

Yeah, likely mute burn. Pray leaves are usually good, but I also wouldn’t rule out light burn.