Aquarium Fluidized Bed Filters/ Fluidized Bed Reactors
Aquarium fluidized bed filters are supplemental filters that can make a great addition to a large, heavily stocked aquarium. By "fluidizing" or suspending fine grained media in a column of water, they increase surface area and contact time for highly efficient biological filtration. Aquarium fluidized bed filters are ideal for planted aquariums, as they won't wear off your CO2. They are easy to maintain and you won't disturb your bacterial bed, which is a problem with some biological filters. Use caution: they are a potential nitrate hazard during long power failures.
Fluidized bed reactors use the same process to suspend ion-exchanging chemical media in a column of water with the same boosts to efficiency, for advanced chemical filtration needs.