Carbon Pellet Filter Case

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.