Replacement Filter Pads fits SUNSUN/GRECH/AQUATOP HW-303B CF400 Aquarium Filters -12 Fine Plus 4 Coarse- -12 Fine Plus 4 Coarse-

FITS: SUNSUN HW-303B / HW-505A AQUATOP UV CF400 Canister filter Grech GW-303B Perfect HW-303B Polar Aurora 370gph UV Features: Provides both mechanical and biological filtration. White fine pads filters out fine particles allowing for clear water. Blue coarse pads traps most visible particles without restricting water flow also serves as a host for all beneficial bacteria. (Blue pads can be reused after rinse) DIMENSION: 7.5” (L) x 7.5” (W) x 0.75” (H) INCLUDES: 4 Blue coarse pads 12 Fine white pads Sponges maintenance tips: 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 months or when the sponge gets worn out.