For some reason I am not seeing the population boom that you would normally expect when keeping ants. I have a Crematogaster cerasi colony of 1/2 year which has had about 25 workers since April. They are hydrated almost every day, fed Tar Heel Ants ant juice every day, and a fruit fly almost everyday. They also get a heating cable. I am seeing no increase in brood. WHat am I doing wrong?