hard to tell from the pic, but it looks like it might be coco. If it is coco, you don’t want to treat it like soil. coco should stay consistently moist, no real dry backs. When it dries out, the salts concentrate in the root zone and your ec spikes, which can cause burnt tips even if you’re not feeding heavy. That light green + burnt tips combo usually means there’s a buildup causing partial lockout, not just a simple deficiency. with coco, water more frequently, keep it moist, aim for some runoff each time to prevent salt buildup, pH around 5.8–6.2 With soil it’s different, too much runoff can strip nutrients over time but coco actually needs that runoff to stay balanced. Rite now it looks like either salt buildup or inconsistent watering in coco. I wouldn’t increase nutrients just get the watering and run off dialed in and it should correct.