Aquarium filters are critical components of both freshwater and marine aquaria. Aquarium filters remove physical and soluble chemical waste products from aquaria, simplifying maintenance. Furthermore, aquarium filters are necessary to support life as aquaria are relatively small, closed volumes of water compared to the natural environment of most fish.
If you've had your tank for any period, you already know the basics: biological, chemical, and mechanical media are what your tank water passes through within a filter to become purified. In general, mechanical filters remove fish excrement and large particles; biological media are home to bacteria colonies that primarily handle excess ammonia, and chemical filtration negates the effects of other specific compounds within the water.
Numerous materials are suitable as aquarium filtration media. These include synthetic wools, known in the aquarium hobby as filter wool, made of polyethylene terephthalate or nylon. Synthetic sponges or foams, various ceramic and sintered glass and silicon products along with igneous gravels are also used as mechanical filter materials. Materials with a greater surface area provide both mechanical and biological filtration. Some filter materials, such as plastic "bioballs", are best used for biological filtration.

Specification:
Bio-Balls: 40 pcs
Ceramic Rings: 500g
Activated Carbon: 500g
Package Content:
1 X Aquarium Canister Filter Media Biological Fish Tank Filtration Biomedia - Bio Ball Ceramic Ring Activated Carbon for SunSun Canister Aquarium Pond Aquaculture Bacteria House in Nylon Mesh Bag