The title says it. I know that many of you have made formicarium's from it, and I have made a couple myself. The thing is, every colony and queen I put in has large worker die-offs and small brood increase. I have tried with multiple species and colony sizes and results are always the same. The material I am using is K-23 firebrick and I got off of amazon a few months ago. It is very dusty material and most likely contain crystalline silica. I know no workers escaped and so I can only assume this dust was the major factor. I have successfully raised many other colonies in other materials like wood, plaster and soil, so I doubt it was something I did. Idk, maybe I'm just using a bad material or something I did was wrong. Any answers or experiences would be appreciated.
-thanks