With five stages of filtration, Jacuzzi® Hot Tubs keep your water clear of dirt and debris. The filtration system works in two phases to capture minuscule particles and debris before the ProClear® filter kicks in to cleanse the water. Next, the surface-skimming weir and ProCatch™ bag cleanse the water’s surface, catching up larger debris. Lastly, the pleated cartridge filter gets rid of all particles. Once the five steps are completed, your water is ready for the treatment process.