I'd have to double check however I do recall that is magnesium or manganese. Which I'm not sure WTF that actually is..manganese ..makes me think of jap anime manga. 😆
It is one of the 2 M words tho..⬆️
What do you feed them, how often? Have you done anything new with your schedule? New products? More less or not enough. These are important factors. 😇💚 Hopefully we can figure it out and save your grow. 🙏🏻