Bloque de nutrientes?? Ph?? O falta de calcio y magnesio??

Yes, it looks like maybe you over fed them as the tips of the leaves appear to have nutrient burn. However, it doesn't look too bad. I would personally just give them a good watering (no feed) at the next scheduled time and then go back to feeding nutrients again at the manufacturers required dosage stated on the bottle. I would also cut off any leaves that close to the ground as they reduce airflow to the rest of the plant, aren't much use in the shade anyway, and risk the plant contracting rot or mould from the soil. Good luck!