Burnt leaf tips, HELP!!!

Hey guys, I got a little problem with one of my babies. The leaf tips started burning 2 days ago, this is a soil grow, some kind of kush strain. Any advise is greatly appreciated.

How much are you feeding them? I'm kinda blind but it looks like nute burn. Flush with just water for a few days and see what happens.

Probably too much. My other plant shows no sign of burn but I had planned on straight water for a few weeks. I water every 3 days now.

Its light burn and bleaching ,raise the light a foot and make sure there is a fan blowing air thru the canopy.