Run a test on the runoff and see what you get, technically the soil has nutrients and so once you're passed halfway through flowing it's best to start watering with Ro and 150 ppm of the Mag/sulfur bottle Of sweetener like Flora Nectar for example.
There's something that looks like tip burn on the tip of the leaves, and the leaf blades are curving to the side, I suspect the feed was to strong or there are bugs to blame....
Dont water again for a day or two, let it dry out a little bit, make sure the ppm drops when you test the run off to confirm the coco has been flushed of the excess and use beneficial microbes with your R.O. Water and nutrients after the coco dries a little bit, and don't over water your roots.
Do you have a water vending machine at the local grocery store? If you do get a few gallons of water and flush that coco real good with plain R.O. water until the run off comes out the same as to what your pouring in.
The damage leaves won't go back to normal but the new growth will get better as the weeks progress.
Have a read at prepping coco in the forum threads, some coco bags need to be rinsed and buffered with nutrients to prevent all the issues.
This points to not being a deficiency, there's 800+ ppm of nutrients in the runoff, the question is why is the Mag issue showing up? 🤔
Does the water drip out of the cloth when you water? I noticed the Air Pots..
Can't you just lift the pot and feel how heavy it is? If it's underwater it will feel light and if it's not underwater it will feel very heavy when you lift? 💪 🤔
Notice how some of the leaf blade is curving to one side? That's a Mag issue, the question now is why is there a Mag issue when you are feeding nutrients? 🤔 can you provide some details of the feeding process?
Had a droopy plant once so i had a closer look and found the stem was missing... apparently something ate the fleshy part of the stem and not the inner stem core.
There's a cloth hanger around the stem with rooting gel in a paper towel covered all up, that's all i know..