It is always recommended that your spa water be regularly filtered to ensure safe water quality and remove harmful elements such as dirt and microbial growth. And that is why you need our replacement Bestway Filter Cartridge for your spa. The filter cartridge is essential in maintaining a clean spa and you can easily use our replacement filter cartridge for hassle-free cleaning and conditioning of your spa water. Not least, it is highly efficient and effective with its superb-absorbent granular activated carbon filter. So keep your spa in continual tip top condition with our pack of six replacement filter cartridges.