Hello as the topic suggests I’m a first time grower using a pot for pot 5 gal setup. Seed is ilgm Bruce banner auto. She’s 10 weeks tomorrow and 3.5ish weeks into flowering All has been going well until yesterday when I went to check on her. I noticed a few sugar leafs on the top cola have browning/yellowing not on all just a few. Is this normal? Should I be worried? Anything I can do or need to do different. Water ph 6.4 has not changed during the grow. Attached a photo below.
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Welcome to the community. I haven’t grown Bruce Banner but many others have.
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Not normal, and I hate when issues show at the top of the plant.
They can be serious and progress quickly from the top cola.
But you came to the right place.
One of the experts here should get you on track again.
@Hellraiser
Those leaves look a bit stressed out, what kind of light and how close to the tops of the plants? Feeding anything at this point?
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Issues that start from the top are micro nutrients. Try adding something like Peruvian Gold Micro Builder but check soil ph first doing a soil slurry test
Could be nutrient related, I don’t see any signs of heat stress in your pistils like they’re singed. @Caligurl and @Hellraiser mentioned on nutrients and feeding 
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Look it maybe light burn how close do u have ur lights to ur plants