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some insect like spider mites for example cause that problem. nothing is visible in this photos so you just take a goood look under the leaves jut make sure that everything is fine. hope u do not have pests good luck

Hi @AmtrGanJaFarmer! I see you've just plugged your carbon filter, so my guess is that this had a dramatical impact on your environment stances (mostly the temperature) and your airflow is now less efficient. With a 80°F / 27°C day temperature, you're already in the red zone, resin production will slow down as well as terpenes potency. Do you have a min/max functionality on your thermometer? What was the MAX temp for the last days? Also, how old is your carbon filter? Is it working continuously, with the help of a thermostat? On the other hand, I also see some dark foliage and the plant has stretched like crazy within the last 2 weeks, that makes me think of a slight Nitrogen abuse. Nitrogen is essential during the stretch but you should control its levels carefully, too much N and your plant will only grow in heights, not enough N and a deficiency will quickly appear and spread. In this situation I would try to slow down on nutrients for a few days and find every possible way to improve the airflow: add tiny fans blowing a continuous cool breeze onto the canopy, consider a carbon filter replacement and/or a new air extractor that you can plug to a thermostat. Hope this will help, keep us up-to-date and happy growing 👊

The clawing leaves are signs of nitrogen toxicity , you don't seems to have heat issue , neither bud rot but to really know you should tell us about your watering routine ( how often, how much ) , your fan don't seems to blow on the upper part of the plant only so I would say N abundance ✌️🏼