I've been thinking of making my own formicarium in advance, and have been thinking of the materials that I'm going to use to build it. Due to the problem that I cannot find plaster of Paris here in Singapore, I decided to try mixing white cement with soil to use for the formicarium. I tested and found out that the more soil you mix, the higher the amount water it can absorb. I poured the soil and white cement slurry into a prepared mould and waited for it to harden. After it hardened, I tried to remove it but it got stuck in the container. Unfortunately, after forcing it to much, the whole thing broke into many pieces. So I went back into testing for a better method. I mixed a little white cement with soil and added a small amount of water. After kneading it like clay, I let it harden and found out that it's seems to absorb more water than the previous failed product. After discovering that, my plan is to mix soil and a little white cement and knead it into a rectangular block, then start to work on the design of the formicarium. After that, I can let it harden and stick it to the vertical surface of a small tank. So the final workpiece is that its mainly made out of soil, only that it has some white cement that provides it with structural stability. What do you guys think of this idea? Because I've been searching for people who had tried it so far there hasn't been any. Do you think the white cement would harm the ants? Oh and I'm planning to burn the surface of the finished product to kill any organisms and then freeze it in the freezer for a day just to be on the safe side.