The filtration tank is a replacement for the tank that is included with Bestway and Flowclear 1,000 gal. and 1,500 gal. sand filter pumps. It is also a replacement for the tank that is included in Power Steel and Hydrium pool sets that include a 1,000 gal. or 1,500 gal. sand filter pump. The replacement tank will connect the hoses included in your original set and can be filled with sand or Polysphere Filtration Balls.