As in the case of the combination pool table and ping-pong table, those who get both truly get neither. If you want to play both pool and ping-pong, the best solution is to get both tables. Whichever game you feel like playing at the moment, you’ll be able to play to the fullest. Likewise, when you have an in-ground pool and a portable hot tub, you’ll be able to use both to perfection. High-end portable hot tubs are an improvement over combination hot tubs in the following ways:

Adding enough salt to reach 2,000-3,000 ppm in your spa takes about 2 lbs. per 100 gallons of water. The mineral in the water raises the buffering capacity of the water to resist changes in pH, alkalinity and calcium hardness levels. The addition of salt increases the total dissolved solids of the water, making the water less aggressive and more resistant to water balance fluctuations.

Beach Umbrella: If you are setting your hot tub in the open during the summer, a beach umbrella, or sunbrella, can be really a cool add to the set as you will not have to worry about a harsher sun during the midday and, specially, because is not recommended to get into the tub using sunblock. Many beach umbrellas can be set besides the tub and enhance your comfort and ensure your protection against the noxious UVA rays.
The downfall we found would be the setup. It’s not like the inflatable spas that you can have set up within 15-20 minutes. While the manufacturer states this spa can be set up within 30 minutes or less, there are some reviewers that state otherwise. In fact, some people say it can take up to two hours because there is a lot to set-up – there’s a lot of pieces that you have to put together carefully. Personally, we feel this is understandable because it’s not an inflatable hot tub and once it’s put together, you can leave it up.
The first thing you notice about the SaluSpa Hawaii HydroJet is the shape, it is a square shaped hot tub. The inflated size is 71″ x 28″ and it is suitable for 4-6 people. You don’t have to worry about installation either because you can have the hot tub inflated using the pump in around 5 minutes. The pump unit is easily attached to the hot tub ready for when it is filled with water. The heater can heat the water up to 104F, which is adjustable and there is a cover with an inflatable insert that can be locked onto the hot tub to hold in the heat and protect the tub from debris going into the water.
Although you will have a water maintenance program going on you will still need to change your water on a regular basis and to do this you need to be able to empty the hot tub easily. When this hot tub is filled to the line with water it holds 177 gallons, so you won’t be able to move it when it’s full. You need to make sure your hose can reach a drain from where you are placing your hot tub.
Although it is advertised as seating 4-6 people, the SaluSpa is scarcely any larger than the Goplus. Its standard capacity is 254 gallons, and I don’t see any way six adults could sit in the hot tub together and possibly enjoy themselves, although I suppose it might fit six if three of them were children. In addition, the control panel is situated outside the hot tub atop the pump, making it inconvenient to access while you’re soaking./
Savings – Here was a big one for us and our budget. An in-ground hot tub or spa can cost from $12,000 to over $20,000 by the time you are done with cranes, excavation, landscapers, masons, plumbers and construction crews, and we are not even talking about the maintenance costs. Acrylic or prefab hot tubs are more cost effective, but you still have the cost of installation. See How To Look After Your Inflatable Hot Tub.