Here it is translated: Looks less like bugs to me and more like a classic deficiency/lockout. Those rusty spots are often linked to calcium/magnesium issues—especially in coco, where it can happen quickly if the pH is slightly off or uptake is blocked. A pH of 6.1 is already on the higher end for coco—I’d aim more for around 5.8 so CalMag can be absorbed better. 2 ml/L is fine, but it won’t help much if it’s getting locked out. I’d lower the pH a bit, give it a proper flush, and then watch how the new growth develops. The old leaves won’t recover—it’s just important that it doesn’t keep spreading. Other than that, your environment looks good—temp and humidity seem stable. Happy Growing Growmie🌱💚