Experience a reinvented massage with the Hydropool Self-Cleaning 655, a 6-person hot tub featuring a comfortable s-shaped immersion lounger and corner seats for targeted neck, back, wrist, and calf hydromassage. Our most popular option for families of 3-5. Our Signature line of hot tubs are Self-Cleaning. This means your water gets skimmed off the surface, heavy particles that fall to the bottom enter the floor vacuum, and all water is forced into a pressurized filter. This method ensures the cleaning system filters 100% of your water every 10 minutes.