Carbon Pellet Filter Case
thingiverse
I use these Activated Carbon Charcoal Pellets. https://www.amazon.com/gp/product/B01F1QZTQC/ There are 3 files, but only 2 are required, 1 is optional. Lid - Top of Filter to lock it after Carbon Pellets are added. Easily popped off and back on. Bottom - Holds all the Carbon Pellets. Mid Section - is there, just incase, you want to extend the size of the filter to hold more Carbon Pellets.
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