Aquaneat Replacement Canister filter pads Features: Fit for SUNSUN Canister filters HW-304B/404B/704B, HW-3000, Polar Aurora 525gph, Aquatop 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.
