Will this DIY work?
I got this idea of DIY filter cartridge for the Top Fin Power Filter. The Top fin power filter has a spot for filter cartridges so i thought this might go in.. You need sponge and bio media and if you prefer, some chemical media.
1. Cut sponge to fit filter.
2. Put bio media in mesh bag behind the sponge. For chemical media you will need to cut a slit in the sponge and pour it in.
Will this work?