これはどんな状態？病気？

hi you have a small ph issue starting to happen and in return starting a lock out of nutrients easy to fix so what you need to do is start a flush, check your run off ph until you get a 6.0 ph reading. next let your pot dry out for a day or 2. start your feed at half the dose, add cal mag into your feed. also if you can grab some kelp. kelp will help your plant rebound quicker from the stress. you can use kelp but i recommend it being used at every other feed. kelp is also very beneficial to your plants root system. as well as it is a great additive to help with heat stress, or any kind of stress. in the summer it gets hotter in my tent and i add kelp before hand knowing it will be hot, my plants handle the heat better with the kelp. so to fix your ph issue is you flush until ph reads 6.0 let pot dry out then feed at half of what you were giving hte plant, add cal mag. continue to have a happy plant. hope this helps