A very heavy BSF composter
This is nothing new in terms of BSF composter design but the use of concrete as a building material is new to me. I wanted to try concrete because of its water wicking properties and the effect that might have on the internal temperature of the colony. Concrete absorbs liquids like a sponge due to capillary action, and hopefully that will lead to enough evaporative cooling to have a noticeable effect.
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