Hot tub maintenance involves several regular tasks to keep it clean and safe. Weekly tasks include testing and balancing the water's pH, sanitizer, and alkalinity levels. Clean the hot tub filter every 2-4 weeks by rinsing or soaking it in a filter cleaner solution. Wipe down the hot tub shell and cover regularly to remove dirt and prevent mold. Every 3-4 months, drain and refill the hot tub with fresh water, and deep clean the surfaces and jets. Inspect the hot tub equipment, such as the heater and pump, for any signs of damage or wear, and schedule professional servicing as needed.