Shake off the summer heat in a cool pool. Make a splash in the cleanest swimming pool in the neighborhood with Unicel C-7698 replacement filter cartridge. Replacement filter for Hayward Star-Clear C1000. When it comes to pool maintenance, do it right with this high-quality replacement filter. Easily install into the skimmer for better water quality at an instant. Whether your filter gets jammed with algae, sand, leaves, or more, this filter delivers quality results. This filter cartridge features an injection-molded knob handle top end cap and injection-molded cone adapter bottom end cap with inner diameters. With 145 pleat count, 4-ounce filter media, and a 100-square-foot filter area, spend less time cleaning and more time enjoying your pool with this efficient filtration system. Canon-ball into summer with Unicel replacement filter cartridge.