This Bundle includes SEVEN items: the Two Little Fishies Phosban Reactor 150; Two Little Fishies Phosban 150 grams; the Lifegard Aquatics Quiet One Pro Model 400 Pump; 3 feet of Black Vinyl Aquarium Hose 1/2" ID; TWO 1/2" Black Hose Clamps; & a Towel. It is perfect for those that wish to use the Two Little Fishies Phosban Reactor 150 with Two Little Fishies Phosban. To use, attach the Quiet One Pump to the Reactor using the included tubing. When putting the Phosban into the Reactor you will want to use one of the sponges included with the Reactor at the bottom of the Reactor. Pour the Phosban onto the top of the sponge. Put the second included sponge on top of the Phosban to hold it in place. The sponges will prevent the Phosban from entering the aquarium. Sandwiching the Phosban between the two sponges also prevents it from tumbling and grinding itself into unhealthy dust. Before putting the pump in the tank or the sump you will want to gently rinse the Phosban. You can do this by running some clean water from one bucket, through the reactor and into another bucket. Rinse until the water runs clear. Phosban adsorbs phosphate as well as silicate, arsenic and water staining organic compounds. Phosban can be effective for several months before being changed. The MarineAndReef Aquarium Cleaning Towel is a durable, lint-free microfiber towel. 19" X 15".