Filter cartridge that can be filled with carbon pellets and inserted into the Elegoo USB filter. Designed with similar dimensions to the included filter cartridge so slide should be a good fit.

I've included the model here if anyone wants to tweak

https://cad.onshape.com/documents/95422b2a2349fa746ab08162/w/1c489417e20a287ad9f57e63/e/567744fa1ad9defecf17f24f