Whats happen?

Grannies got it right. I too have been struggling with a plant that continues to stump me. She acts nothing like previous grows. Low EC and PPMs seems to be the key for her. But she has been difficult although slowly improving. So keep the faith. Good luck.

@GrowingGrannie the idea with a shock when the PH changes sounds quite logical, I didn't think of that at all. As written in my diary, I added phosphorous guano and added one more tablet, after all they are for 10 weeks and I still have a month to go. Thanks for the response.

I'm completely unfamiliar with the nutrients you're using but they seem to be fairly decent. I'm a little concerned about both the EC you have and the pH issues you had - I'm growing a Gorilla Glue in DWC myself and she 1) doesn't like a high EC at all - in fact, she doesn't do well if her ppm gets above 550 and she's about 2 weeks to harvest! And she's never liked a high pH ... and by "high" I mean in the range of 6.3-6.4! Nor does she like a very low pH - she does best if I can maintain a pH between 5.8 and 6.0. The large swing in your pH (from 7.0 down to 5.?) was probably very VERY stressful for her... weed, in general, does not like massive swings like that... it's better to reduce/increase (whatever is needed) SLOWLY... it probably would have been better if you had taken that 7.0 down to 6.0 and tried to keep it there.. The plant, at this stage of life, is needing a lot of potassium and phosphorus (and only a LITTLE bit of nitrogen!)... so if you could find a good PK booster to use, this is the PERFECT time to start using it. Have patience... she's only JUST starting her work on her buds and if you supply that extra PK, she'll start to bulk up nicely. For future grows, I would perhaps consider a different nute line... I've tried a couple myself and have found that General Hydroponics Flora Series to work best in DWC with their KoolBloom liquid for my PK boost... Good luck... (oh, and the leaf tip burn is pretty normal... nothing to really worry about at this stage!)

Hola hermano cultivador!! Podría ser que a tu planta le falte algún nutriente o vitamina!!Yo creo que le faltó un poco de nitrógeno o hierro y por esto se puso amarillla, quizás no pudo absorberlos bien devido al PH utilizado, si es así lo mejor es utilizar un fertilizante soluble en agua que la raíz pueda absorber rápidamente, la planta volverá a cojer color verde! Un saludo y suerte! 👋😎👍 🍀 🍀 🍀