Discolored, burnt and curled up tips on higher leaves

Your plants look over fed. They are deep green and the leaf tips are burnt and curled. Your nutrients are too strong or too frequent. If you are able to put those plants in the bathtub and flush the soil with a few gallons of pH balanced water, that will reset your soil and from there you can let the pots dry out till they feel light, then water in a pH balanced nutrient mixture thats appropriate for the growth stage you are in and monitor. It's better to feed a weaker solution more frequently, than a concentrated mix less often. They like dry soil remember, so when your watering your plant and it doesn't need water, but you feel compelled to "love your plant" DON'T. Instead of travelling in and out of your garden all day long looking in on them just cuz it's neat, fuckin buy a security camera and install it in your grow space. Then you can look at them 500 times a day if you want, and without disturbing their environment and wearing out your tent zippers lol I can monitor my plants anywhere there is a internet connection. I can monitor them at night and see what they are doing during the night cycle. In fact the night cycle was where i first saw the raised leaf tip edges which told me they were burned from hot nutrients. Security cameras in your grow space have proven to be extremely valuable, and a useful tool to ensure success, and to always be on top of your grow at every step. Remote temps, humidity, and VPD are also super valuable to be able to monitor on my cell phone.