Canister filter parts for aquariums are listed for sale on ThatPetPlace.com, PetMountain.com and PetSolutions.com. All three websites carry a variety of parts including o-rings, gaskets and canisters and will ship them throughout the United States.
Canister filters work well at circulating the water and keeping it clean, especially when they are combined with another type of filtration system. These filters are best for larger tanks and work well with saltwater tanks. One of their drawbacks is that they can clog easily and these clogs can affect water quality when they decay. This means that certain types of aquarium setups, such as reef aquariums, will need frequent filter changing and cleaning.