Print in place, stackable, liquid filters.
 

4 pauses so you can add the internal components without supports. Glue if desired. Add activated carbon pellets during printing. Recommend a coffee filter at the bottom of each filter module.

This is set to PLA for accessibility but you should really use PETG for this to avoid leaks.

DM me and let me know about your leaking challenges because I'm not usually aiming for water tight prints.