Aquarium water filtration is no joke. Filtering the water of your aquarium is a matter of life and death. Unlike toxins in a land environment, aquatic toxins are hard to see because most of the time these harmful compounds are dissolved in water. These toxins are also colorless and could even be invisible. The water is the place where your pet live and eat that's why it's very important to filer these toxins well.
Filtration pads are primarily designed for physical filtration; they clean debris and material that is floating in the water. They also help other filters in your system by taking care of the physical debris and pollutants in your water to allow the chemical filtration segment of the filter to work optimally. The physical and chemical filter work hand in hand; the better your physical filter, the less work your chemical filter would have to expend in dealing with physical debris.
There are many different kinds of physical filters ranging from sponge-like structures to filter pads. If you're using a filter pad for your aquarium filter, look into Lifeguard Aquatics Bulk Filter Pad 90 Feet X 2 Feet from Pet Store. This filter pad comes in a nice sheet that you can cut to custom fit your filter. It's finely meshed so it catches physical debris, but not too much that it gives your filter pump a hard time. If you're looking for effective filtration and maximum customizability, look into the Lifeguard Aquatics Bulk Filter Pad 90 Feet X 2 Feet.
Bonded, keeps original shape
Superior filtration with uniform and consistant material
Duplicates or surpasses original equipment specifications
Long lasting material
Filters large debris