An inflatable hot tub is definitely at the smaller end of the “size” spectrum. When the specifications declare it's a 4-person hot tub, what that really means is 2 children and 2 adults all sitting close together, or 4 adults all sitting very close together. The average 4-person blow up hot tub that holds around 200-250 gallons is best thought of as a 2-person hot tub, with plenty of room to stretch out and relax. That’s not to say that any more people is out of the question, but more than 2 and you’re likely to find yourself making contact with someone else. For some this closeness may not be a problem.
One of the most important qualities of a hot tub is its level of comfort. At the end of a tiring day, you want a comfortable tub to sink into and relax. Many owners of inflatable spas note that they are actually more comfortable than traditional Jacuzzi tubs. Instead of rigid fibreglass, inflatable tubs are made of air-filled PVC which is a much softer material. The walls of inflatable models make for great headrests, and you can even purchase a cushioned lining to really enhance the experience. There are many features that come with inflatable hot tubs that make enjoying them very easy. Some models come with an adjustable timer that you can set to tell the spa when to begin heating. With this setting, you could program it to heat up before you get back from work, so you can walk through the door and get straight into a hot, welcoming Jacuzzi.
First and foremost, you have to look for a model that has a quality construction. The durable construction is going to ensure that it will be a lasting investment, meaning that you won’t have to replace it for a long time. What we recommend is a tub like our top choice, the SaluSpa Hawaii HydroJet Pro that features polyester laminated PVC for the construction of the tub. Also, to figure out whether you are looking at a top quality model or not, you should search for the I-Beam technology feature as well because it shows increased stability, safety, and durability.

If you are looking for an affordable and feature-rich inflatable hot tub, the Coleman Lay Z Spa could be a good choice. Made of durable fabric-coated cover, it is a resilient option with a cushioned floor for added comfort. The drain valve is conveniently placed and the tub has luxury features such as the Lay-Z massage feature, which is an added advantage. With the well-reputed Coleman name, you can be assured of a durable product. The integrated filter also helps to maintain the cleanliness of the tub. 
 The water must be treated with chlorine and clarifier. One increases the pH of the water and the other reduces it. It is the balance of alkalinity and acidity of the water. Sometimes the water is new and clean but it becomes cloudy because the pH is too high, so you have to balance it with the alkaline. Just like a pool, is very important to treat the water. Some customers look for tubs that have a chlorine filtering system. That is quite unlike. Hot tubs need the chlorine to be up and about circulating in the water, otherwise it becomes quickly a bacteria colony infested, not to mention the proliferation of algae. Hot tubs are not showers or common bathroom tubs, you will not replace the water after use so you really need the chlorine, for better or for worse.
The exterior is made from a specially coated fabric that is suited to withstand the outdoor elements. It is the classic Coleman-brand green. (This is usually their hallmark color for many of their products.) It also comes with a green fabric cover that is lined with aluminum material. The aluminum coating serves to keep the water warm while you’re waiting to jump in.
We live in a multipurpose, multitasking world. Cell phones are now computers, capable of performing thousands of tasks. Printers come with fax machines, copiers, and scanners built in. Trains equipped with wireless internet allow commuters to work on their way to and from the office. Couches fold out into beds; pool tables convert into ping-pong tables. It’s no surprise that in such a world, in-ground pools are often built with in-ground hot tubs attached.
If you are looking for an affordable and feature-rich inflatable hot tub, the Coleman Lay Z Spa could be a good choice. Made of durable fabric-coated cover, it is a resilient option with a cushioned floor for added comfort. The drain valve is conveniently placed and the tub has luxury features such as the Lay-Z massage feature, which is an added advantage. With the well-reputed Coleman name, you can be assured of a durable product. The integrated filter also helps to maintain the cleanliness of the tub. 
With a rich tradition of tubs that are manufactured in the United States with cutting-edge technology and affordability, the Coleman brand is recognized as a powerful brand people can trust. The innovation of this brand provides a remarkable 75% retention rating, meaning people will opt for Coleman over a competing brand. That is why 87% of Coleman owners will strongly recommend the brand to others. And no to surprise, their products come with features that provide an eco-friendly purification system, exclusive upgrades and cost-saving technologies.
Seats: Bear in mind that inflatable hot tubs, as well as most hot tubs in general, are not deep enough to require sitting spots. All inflatable models come with a air cushioned floor that is quite enough to make you comfortable and still insulate the tub. Optionally though, you can purchase seats, while they are not essential to use the tub, specially because it will lift you up and make the immersion less effective. For people who are short, as well as kids, though, the seats can enhance the comfort.
Don’t forget to check our list with some reviews for the cool accessories you can set with your hot tub and, for further information on how to take care of the water of your tub, we recommend a reading on the great water treatment guide Lay-Z-Spa developed for its customers, where you will find all the info you need on chemicals required to treat the water, dosages and how often you should perform these routines.
You’ll notice right away that saltwater feels softer, almost like a mineral bath. The salt used is sodium chloride, which is essentially regular table salt. It’s also the same salt that is in the ocean, but only about a tenth of the amount. Get a 40 lb. bag of pool salt, add 2 lbs. per 100 gallons of spa water, and you’re ready to go! The salt is very cheap, about $7 per bag. The slightly salty spa water leaves your skin feeling refreshed, not irritated, like bathing in mineral spring water.
The biggest issue with the Hawaii Air Jet is the same that besets all SaluSpa products – the obnoxious placement of the control panel. The massaging jets are great, but the last thing I want to do is half to get out of the spa to turn them on, and I inevitably forget to turn them on before I get in. This is a small complaint, of course, and doesn’t diminish the value or the durability of this hot tub.
Intex’s PureSpa Bubble Massage hot tub is a very spacious tub by pretty much all standards, managing to accommodate up to four people at the same time. It also benefits from a built-in hard water treatment system that makes water more gentle and an insulated cover with a lock to minimize heat loss. At the same time, the tub uses a PureSpa patented heating system, a 3-way test strip, a floating pool chlorine dispenser, a thermal ground cloth, an inflation hose, and two filter cartridges.
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