Pleatco PureSTART Pro PPS10K 10k gal Premium Pre-Fill Water Filter. A revolutionary product range scientifically engineered to overcome the problems associated with Tap, Ground and Well water being used for filling and topping off spas and pools regardless of make, model or size. These new disposable sediment filter cartridges are made from unique melt-spun filtration technology for perfect depth filtration. Pleatco PureStart cartridges attach to a garden hose and capture dirt particles filtering the water BEFORE it enters into your spa. A must have!