This has occurred since yesterday we believe it could be a lack of nutrients or even an overdose but we are not sure it is just a guess and need help because we do not want it to spread any further
But it only occurred with those who received a slightly too high dose of molasses per ml of water yesterday. Those who did not get this dose have no problems. So it can't be the PH value? they all get the same water. And for 5 weeks we have been using the same water without any problems
For me, I usually see the brown tips/margins with a PH swing, and it comes on fast. What is the PH of your medium, and what is the PH of your water? For soil it should be around 6.5, for Coco, 6.0-6.2, and for hydro 5.8ph ish.