Steve
When I did it I made up play dough using flour, water and salt. It did stick in the plaster a bit. I had to scrape out some of it with a knife. Basically I had to take off a thin layer of plaster from quite a bit of the chambers. I think your nest looks really good btw. Are you going to sit it in somethin to enable it to soak up water you add?
Still not sure yet damon, still have not decided what ants im putting in there. I made the play dough the same way as you, glad it didnt dissolve this time :D
lol well its a serious failed attempt anyway.. its like totally stuck inside the tank i poured it into lol.. and it did dissolve some of the plastercine i used to model the chambers.. I think il give plaster a miss all-together.. I much prefer ytong anyways lol
ha i had that problem i could never work out good way to get the plaster out, i found plaster a bit hap-hazard, i never had a problem with mould or tunnelling though, (ligniperda not good diggers i guess)