Features:
Compatible with SUNSUN Canister filters HW-304B/404B/704B, HW-3000, Polar Aurora 525gph, CF-500.
Bio sponge pads come in 3 densities: coarse medium and fine (reusable after rinsed)
Trap most visible debris particles without restricting water flow.
Provides both mechanical and bio filtration
Includes:
3xcoarse (Blue)
3x medium (Green)
3xfine (Black)
Tips for Usage and Maintenance:
Maintenance of Sponges:
the sponge will need to be rinsed every time it becomes dirty, about once every 1 to 4 weeks.
After 6 to 12 months' usage, the micro holes of sponge is gradually clogged by the tiny debris. So it is also recommended to replace the sponge once 6 to 12 months or when the sponge gets worn out.