Compatibility: Compatible with the Fluval FX4, FX5 and FX6 canister filters.

Package Include: You will get 8 canister filter pads at a great pricea plentiful quantity to satisfy your daily use and replacement needs so no need to worry your aquarium or fish tank getting murky.
Advantages:
1. Phosphate resin infused pads perform double duty as both an effective mechanical and chemical media.
A. Phosphate Reducer filter pads are made of high-density sponges contains photocatalyst medium, which utilizes sunlight or artificial light sources to activate photocatalyst,
thereby decomposing pollutants in water, effectively help to remove and controlling phosphate.
B. Meanwhile, they are also good at filtering out fine particles from the water, such as debris, waste, and food. Using these filter pads can help maintain the health of the water in your aquarium.
2. Easy to install: Easy to install and directly fit, saving your time and money.
Note: This is non-original aftermarket part, but can Perfect match and work. For best results, replace the pad monthly or as required after testing water.