In order to properly regulate the heating, water flow and filtration for you home spa, you may want to purchase a skid pack. Skid packs commonly include a water pump, filter, air blower and heater as well as assorted pieces of plumbing and hardware for the initial installation. Water pumps are designed to circulate water through the spa system and power the jets. The filter will remove the debris, algae and other dirt particles from the water and the air blower will give the water its massaging quality. The heater is used to regulate the water temperature. Every piece of equipment works together to ensure every aspect of your hot tub is at appropriate levels for functioning.