Mold and Mildew Test - Day 27

We recently switched the HumiForm Cigar Humidifier filament tubing from painted PVC to copper. In doing so, we learned about copper properties in reducing micro-organisms. There appears to be a long history of using copper as a way of reducing mold growth for containers holding water, although the mechanism doesn't seem to be well understood. For curiosity, I've added a new container of tap water with a filament, and dropped a penny inside today. Will begin monitoring and reporting along with previous containers and filaments. 

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