Aquarium Filter Pad for SUNSUN/PERFECT/GRECH/SUPER HW-304B/404B/704B Canister CF-500

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Aquarium Filter Pad for SUNSUN/PERFECT/GRECH/SUPER HW-304B/404B/704B Canister CF-500

This is  replacement filter pads for SUNSUN/PERFECT/GRECH/SUPER HW-304B/404B CF-500 Canister filter.



  • The activated carbon filter pad traps and removes water discoloration, odor, residual medications, toxins, pollutants and dissolved fish waste. 
  • The ammonia filter pad helps control the toxins associated with a new aquarium, overfeeding, and overcrowding
  • Phosphate filter media will reduce the need for frequent water changes & reduce many other mechanical filter applications. 
  • Bio sponge filter provides both mechanical and biological filtration
  • Prevent the smallest dirt particles, while keep perfect water flow.
  • Use for freshwater and saltwater aquariums.
  • Promotes nitrogen cycle reduce the death rate of fish
  • Can be used again after cleaning



8.5” (L) x 8.5” (W) x 0.75” (H)



Tips for Usage and Maintenance:

  • It is recommended to place the blue filter sponge after the white filter pad
  • Maintenance of Blue Filter Pad:
    The sponge will need to be rinsed every time it becomes dirty, about once every 1 to 4 weeks. It’s helpful to reserve the beneficial bacteria by washing the sponge gently with water from the fish tank instead of tap water.
    After 6 to 12 months’ usage, the micro holes of sponge is gradually clogged by the tiny debris, the beneficial bacteria won’t have as much living space as before.  That’s when the sponge filter starts to lose its efficiency.  So it is also recommended to replace the sponge once 6 to 12 month or when the sponge gets worn out.