AquaShine Replacement White Foam Filter Pads Fits Fluval FX4 - FX5 - FX6 -12 Pack-

FITS: Fluval FX4 / FX5 / FX6 Features: Provides both mechanical and biological filtration.. Traps most visible particles without restricting water flow also serves as a host for all beneficial bacteria. DIMENSION: 15" (L) x 3.5" (W) x 1.5" (H) INCLUDES: 12 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.