In my acromyrmex ants, I noticed that new offspring are dying. Some survive, but most of the new tumors die. What should I do? Conditions for them are: 24 degrees, 90-95% humidity. I have had them for 6 months, the colony is developing well. The fungus grows, but the offspring dies. Is this the fault of food? During the winter I have to feed them with buying roses or Antstore food. In the summer I give them my own roses from the yard. Please help.