Filtration System 2000. For pools up to 2000 gallons. If need more filtration more units can be attached. 12W x 24Lx4H filter box with carrying handle. Carbon and Polyester media for mechanical/biological/chemical filtering. Accepts 1 tubing. Recommended pump up to 1800 gallons. For example, can use the Praefecta Pond Pump 1800 and select 1 tubing for attachment.