Its good to keep an eye to not over-watering your plant, keep the rule of thumb by digging your finger into the soil and check the moisture. When you feel 1-2 fingers deep dry you can feed your babies, or do the same by checking the weight of the pot, it seems that the bed medium that u using keeps a lot of moisture, maybe u killing your plant's oxygen on the root system. Keep a working fan sending air directly to your pot or by moving, not so close to your plant so you will prevent bend, it will help with the aeration in the roots.
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