Periodic Products FillFast™ Professional LLC PER-FILL-1 Pool & Spa Metal Remover and Water Pre-Filter System 4 Sump/2 hose which combines two Carbon Filters plus two patented CuLator® Filters in one unit. FillFast™ traps and removes metals before they get into your swimming pool. FillFast™ helps prevent staining when filling for the first time, when adding make-up water, or when adding water after a resurface. FillFast™ Pro Pool & Spa gives the option of using with a single garden hose or two garden hoses. FillFast™ Pro treats up to 40,000 gallons of source water (depending on water quality).