Slight burnt tips but not bad. A Lil droopy, looks like you just watered before the pic. Did you over feed and backed off on the ec once you saw the tips burn? Now she's not getting enough.
Truly can't tell you anything until you tell us your variables. What do you feed? At what ec or strength? In what medium? How often? Light details? Environmental details?
Could be anything, overfeeding, ph, underfeeding. You could have it right and just not be feeding frequently enough. Help us help you. But in my experience if your using a good line for nutrients it's your technique. The plant food has what the plant needs.