SIZE： 143 x 95 x 290 mm
1、Easy installation: the fluidized bio filter can be hung beside the aquarium or sump; or placed in the aquarium or sump; or installed in the cabinet under the aquarium.
2、Different kinds of filter media in the fluidized bio filter can be chosen according to different breeding fishes and different conditions of aquarium water: crystal sand filter media, ion exchange resin, other filter media, etc.
3、Various matching and assembly modes: It can be connected to the leaching pipe to increase the oxygen dissolved in water；In large aquariums, several fluidized bio filters can be used with parallel connection to increase the filtration effect.
Includes sand media. Requires a powerhead and connection tubing for operation (not included).
Info courtesy of:
A fluidized bed filter, sometimes called a "suspended particulate filter" or a "suspended sand filter," is a tube or box that hangs off the back of your fish tank, or a cylinder or canister which stands in your sump or on the floor beside or under your fish tank, and is connected to a water pump in the fish tank (or sump) to move water through the filter. These filters force water through a churning mass of small, heavy granules - usually sand, silica chips, or plastic - in the bottom of the tube.
Fluidized bed filters provide biological filtration very similar to that provided by under gravel filters. Nitrifying bacteria colonies grow on the surface of the particles of sand in the bed, and process ammonia and Nitrite into Nitrate as the water passes through the filter.
Water needs to be pumped into the fluidized bed filter using a water pump. These aquarium filters usually do not come with an integral pump, so a separate water pump will need to be used. This is usually a power head located in the fish tank and connected to the filter by tubing. However, the power head could also be located in the sump, if your aquarium system is set up with a sump to accommodate other filters and equipment.
The water is pumped into the bottom of the filter, up through the media, and then flows back into the tank from the top of the filter body. Because of the speed at which water is passed through the filter media, it becomes 'fluidized' - the grains sand (or pellets or whatever) are constantly being pushed up by the current and then falling back through the water in response to gravity, similar to the 'snow' in snow globes.
Fluidized bed filters require very little maintenance themselves. However, the pump will require regular maintenance, including cleaning the impeller, impeller shaft, and intake and outlet as debris collects and algae and bacteria grow. If this is left unchecked, it causes reduced water flow, which leads to poor filtration.
You will also need to monitor the sand bed, as it can eventually settle and become stagnant. This should not happen for a long time, maybe even years, and is most likely to be a problem after an extended power outage.