Help one of my plants has a problem

Any ideas on how I can save her?? Growing in soil under HLG550. Gave them all first feeding 2days ago all other plants look fine

You need to repost pics...nothing came through.

Temps on/off? Type of soil, nutes?
Air exchange/movement? Lots of questions for anyone to help.
FF

Watering schedule, light distance from plant, tent, open room , co2 or no, etc,etc.
FF

Temps are 76 lights on 71-72 off fox farm soil 6 in exhaust General hydroponic. Nutes. WTering schedule varies. I had to move my tent to the garage so soil has been taking awhile to dry out. I water when the 5 gallon pots are very light. Also a oscillating fan for air movement. I have a titan temp/ humidity controller RH around 50%

looks like what you just said.....taking too long to dry out .....give her a lil less food too. she looks slightly overwatered. no big deal , just stay on it....everything is looking good otherwise.