Hot tubs are pretty easy to maintain. If you have a quality tub with good parts, maintenance should take no more than an hour per week with regular use. You'll need to do weekly water quality tests and add any necessary cleaning or balancing chemicals. And every month, you'll need to clean or change the filters. Plus, of course, it's necessary to change the water every three to four months. Professional hot tub maintenance is similar to the cost of pool maintenance.
The amount of jets you need depends on their placement and the appropriate pressure. You should focus more on a lower amount of jets with good pressure that can evenly spread the water. Aim for a maximum of 30 jets per massage pump.
More important than the number of jets is the size and placement of the jets; they should follow the contours of your body, with larger jets for larger body areas, like your back and shoulders, and smaller ones for smaller areas like your wrists and neck.
It depends on the jets, pump, and electricity. You can have a good flow with less horsepower. If you buy one with outsized power but don’t adjust the plumbing or electrical system, you might cause issues. A local electrician can advise you whether you need a horsepower upgrade and what changes you'd have to make to your electrical system to accommodate it.
If your hot tub is less than 10 years old, it’s probably worth fixing. If the repair bill is half the cost of replacement, consider getting a new one. You also need to weigh up the frequency of repairs. If you're finding you have to have repairs made multiple times a year, then your hot tub could be nearing the end of its useful life, and it becomes false economy to continue with repairs, which can quickly mount up, when installing a new hot tub costs $150 to $530, plus the cost of the hot tub, which is between $2,000 and $35,000.
Most hot tubs last 10 to 15 years, depending on the design and quality. Inflatable models may not last as long. How long your hot tub lasts depends on the environment, how much you use it, and the level of care and maintenance it receives. Using water softeners, having your hot tub serviced yearly, and taking care of any minor issues as soon as they arise can significantly prolong your hot tub's life.