Deficiences

I had the same problem with Biobizz and same strain. It is a Nitrogen toxicity, probably too high EC aswell. You shouldn't use Bloom yet, aswell, but it is generally your choice. Follow the EC. Biobizz wrote to use ALLMIX dosages on LIGHTMIX soil on automatics. Do something about it before it is going to affect freshest leaves, yellow clawly parts would probably just crush and fall off with time. Lower Bio-Grow or use only Bio-Grow. And EC+PH meter, you won't have to guess with this kind of stuff!

To simply answer your question this the beginning stages of a potassium deficiency/lockout. This may be because your pH is kinda high for potassium intake try bringing it between 6.0-6.5 also at this stage of life the humidity is crazy high I would be aiming for 50-55%

Lower your pH to 6.2. 7 is at the far end of acceptable range. At a pH of 6.2 your Macro nutrients will be much more available than they are at 7 Next nutrient purchase i would suggest a different line than BioBizz. I see more growers with problems when using Biobizz over anything else.