Problem with front middle purple punch. Info provided(See description for more); Temp: 71-79.5F, RH: 46.1, DLI: 40-50(decreased today due to tacoing)

Hey there, you have a ph issue. It is causing the roots to not be able to absorb nutrients from substrate. She is in turn eating herself from her stored energy. Which causes the signs. You need to immediately find out via run off if ph is too high or low in substrate. Then make immediate steps to counteract it. Pulling ph back into range.

Hey Growmie, Your ph is too so your plant is suffering from nutrient lockout. Your going to want to flush the medium to remove any excess salts, make sure you're keeping your ph within 6.0-6.5 to make sure the plant intake the nutrients it needs to grow those nice big buds.

Your salinity "saltiness" levels of your soil is way to high, its reversing the direction of osmosis at the root level causing nutrients to be pulled out of the plant to balance the root zone. You can see the tip burn as a result of this, curling leaves is also a sign of an issue at the root zone. Flush your plant with balanced pH water at 6.5 and try and read the water off run. Every time you water your plant with nutrients or maybe even plain water, its always a good idea to let 15% - 20% drain as this can stop the salts from building up in the soil. Once lockout has occurred, all nutrient uptake is affected and can only be fixed once the salinity of your soil has been flushed; at late flower your EC for water run off should be around the 3.7 or TDS 1850ppm. Thats what it should be around, you might expect to find an EC of 19 or TDS of 9500ppm depending how bad the lockout is