Two Little Fishies PhosBan Reactor 150The PhosBan Reactor 150 is designed to push water upwards from the bottom and through the media. This forces an even distribution of water throughout the media and prevents channeling from occurring. This is also great for fluidizing media such as GFO where the filter media needs to tumble gently and evenly. The PhosBan 150 media reactor has a low profile and built in hanging bracket making it ideal for "hang on the back" applications. The Phosban