This nest inset can be placed into an ant arena and be filled with a e.g. sand-loam-mixure or any other nest soil as well as a gypsum nest. The special feature is that it's removable and can be removed for example to hibernate the ants in any cool place. As an entry and exit as well as a for ventilation there are two 10mm-bores at the bottom. For hibernation they can be closed by a formicarium plug.
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