Effective filtration: This spa filter is designed to remove soap, oil and other particulates, reducing the need for chemicals and minimizing filter cleaning. It promotes cleaner water and improved water care. Easy installation: Simply place the filter over the skimmer basket and align the notches for a secure fit. Rinse the filter weekly and adjust the frequency based on spa usage. Durable performance: Made from fiber with a polypropylene frame for durability and efficient filtration. To maintain peak performance, replace every 3 months. Compatibility and contents: Fits spas manufactured in 1998 and later with a 19.5 cm diameter. Each package includes 2 or 4 filters, providing ample replacement for regular spa maintenance needs. Use scenarios: - Regular spa use where filtration helps keep water clear and reduces chemical demand. - After heavy use or exposure to oils, lotions, or sunscreen to restore filtration efficiency. - Seasonal or infrequent use (vacation or weekend setups) to ensure fresh filtration during maintenance windows.