Aquarium Canister Filter Pads 9pcs for SUNSUN HW

Replacement bio sponge filter pads compatible with SUNSUN HW-304B, HW-404B, HW-704B, HW-3000, Polar Aurora 525gph, and CF-500 canister filters.

This set includes 9 filter pads in three densities: 3 coarse (blue), 3 medium (green), and 3 fine (black). The layered approach delivers both mechanical and biological filtration, trapping visible debris without restricting water flow through your system.

The pads arrive vacuum-sealed for compact storage. Simply unpack and soak them in water—the sponge will expand to its full operational size. Each pad is reusable and can be rinsed and cleaned between maintenance cycles, reducing ongoing replacement costs.

Suitable for freshwater and saltwater aquarium setups, these filter pads maintain water clarity while supporting beneficial bacteria growth on their surface. The combination of densities allows coarse pads to capture larger particles, medium pads to trap smaller debris, and fine pads to polish the water for crystal clarity.

Check your canister filter model against the compatibility list to confirm fit before ordering. These pads are a straightforward maintenance item—simply replace or rinse as part of your regular aquarium care routine.