This seems fine for capturing muck and maybe rinsing a couple times and throwing it out.
The sponge (for the bottom spot) which comes with the filter lasts almost forever!
I think it is page 4 for the stock configuration
Are you throwing the sponges out, the ones that come with the filter?
New to FW fish? First tank in a long time or EVER??? Need some info on keeping fish?
Start here - Aquarium Advice Article
FW Favorites right now Clown Loaches, any shrimp - SW Vase Red Mangroves