A large well-stocked pond, especially with Koi will need sufficient filtration to ensure that the water is cleansed of fish waste, debris and contaminants. Multi chamber filters have sufficient space to hold various types of media to perform multi-stage filtration for large amounts of water. Most models come complete with filter media to ensure that as the water passes through the unit, it is cleansed, strained, or treated. Each filter is complete with the accessories needed to set up the kit quickly and efficiently.