Frequently Asked Questions

● Are your in-ground spas the same round spas that are attached to swimming pools?
No. Those spas are gunite, or concrete spas that usually run off the pool system.Our spas are made from acrylic and backed with fiberglass. It is the same spa you see sitting on the back patio, just we put ours in ground.

● What are the major differences between the in-ground spa attached to a pool and the Spas by Design in-ground spa?
There are many, many differences between the two in-ground spas. First, our spa is not fully in-ground. We build our spas approximately 18” above the ground to allow for easier access in and out of the hot tub. We also design and build our spa surrounds with travertines, stones, and stuccos to match and blend into your existing environment.
Another difference between the two spas is all of our plumbing, pumps, and equipment are connected to the spa. This means that if there is ever an issue with a pump, heater, or jet, we do not need to tear up a bunch of concrete and dig up long runs of plumbing lines to make a repair. Our repairs can be made within an hour or two making the life of our spa much more cost effective.
Finally, our spas are therapy spas meaning they are built with contours and seats that comfortably seat the human body and are designed to relax and relieve the human body. Gunite spas are built with a bench and some concrete. They typically come with 6-10 jets and are equivalent to sitting in a very expensive concrete bathtub. Our spas come with 35-75 adjustable jets that are designed to comfort and soothe those aching muscles and joints.

● What are the cost differences between a Spas by Design in-spa and a gunite spa?
There is a significant price difference between the two. Due to excessive construction related costs, the gunite spa is 35%-50% more expensive than a Spas by Design in-ground spa. Our acrylic spas are also less expensive to heat and maintain per month!

● What are the monthly costs associated with operating a hot tub?
Operating and maintaining an acrylic spa here in the Phoenix Valley is relatively inexpensive. Using low amperage pumps to circulate the water, a foam insulating cover, and energy efficient spa equipment, operating our spa is around $20 a month

● How do we know Spa Marvel is working?
Users of Spa Marvel should expect to have clear, odor-free water at all times, which on its own can be indicative of good water. However, to be certain that ANY body of water is safe, regardless of the water treatment system that you use, the true test is the absence of bacteria in the water. The Spa Marvel Company Inc. has home bacteria test kits available.

● Is Spa Marvel compatible with other spa water treatment products?
Spa Marvel is compatible with all hot tubs and traditional spa treatment systems including ozonators, ionizors, ultraviolet, chlorine, bromine, lithium, and salt systems.

● How does Spa Marvel compare in price to using traditional spa treatment products?
You will spend the same amount of money using Spa Marvel as you will when using traditional spa water treatment systems. Further savings can be realized when you factor in less frequent water changes and the associated heat-up of those water changes, no longer having damaged bathing attire and no more chemical damage to your lid, jets, heaters, jewelry, hair and nail polish. There is a school of thought that soaking in traditional spa-care chemicals may have negative long-term health consequences, on which a price cannot be put.

● Is it okay to use hard or soft water with Spa Marvel?
Traditional spa treatment products work best at specific water-hardness levels. Spa Marvel will work at any hardness level, and given the choice Spa Marvel prefers softer water over harder water, but it is not a requirement. If your source water is so soft that it is corrosive and damages your heater and seals, then please adjust the hardness using calcium hardness increaser as per your professional spa store’s guidelines.

● How long does Spa Marvel last for?
Spa Marvel has a 10 year shelf life. One full bottle of Spa Marvel will treat any tub up to 500 gallons and will last for 3 months with regular use. Spa Marvel is engineered to account for the fact that tubs do experience evaporation and some degree of spillage through regular use. Keep in mind that if you lost most of your tub water (i.e. a major leak or massive spillage) that Spa Marvel may not last as long as 3 months. Every 3 months simply add another bottle of Spa Marvel.

● How often do I need to change my water when using Spa Marvel?
With Spa Marvel you can often go up to a year without changing your water. You do not need to change it as often as you typically would, as you are not super-saturating the water with all kinds of chemicals on a routine basis and the TDS (total dissolved solids) of the water increases only marginally. For best results do not go over a year without changing the water. Water will wear out after a year and you will have difficulty maintaining the pH.

● My tub is only 250 gallons, do I only use ½ of the bottle of Spa Marvel every 3 months?
Use 1 full bottle of Spa Marvel for any tub up to 500 gallons. The reason is in smaller tubs, the bather load per volume of water is often great than it is in the bigger tubs.

● What happens if I go more than 3 months without adding another bottle of Spa Marvel?
At some point you will start to encounter hazy water, pH travel, and the water will lose its “silky” feeling. For best results add 1 full bottle every 3 months.

● Our tub is bigger than 500 gallons. What do we do?
One bottle of Spa Marvel treats all tubs up to 500 gallons for 3 months with regular use. If you had a 1500 gallon tub, which is 3 times the size recommended for 1 bottle, you need to add 3 bottles for 3 months. In other words, 1 bottle of Spa Marvel will last 1 month in a 1500 gallon tub, and can be added monthly.

● Can Spa Marvel be apportioned for shorter periods of time?
Yes. If for example your tub was at a vacation home that you only used 2 months of the year, you can use 2/3 of the bottle of Spa Marvel for 2 months. This formula can also be used if you are planning extremely heavy use of your spa. If you know that you are having a party a month after filling the spa that will result in such heavy use that a water change will be necessary, use 1/3 of a bottle of Spa Marvel to last for that month. After the party, change the water and use the remaining 2/3 to last another 2 months.

● Is Spa Marvel Water Treatment and Conditioner safe?
Yes. Spa Marvel is safe for children, pets, and birds and does not stain clothes, ruin highlights in hair or harm jewelry or nail polish. Spa Marvel is a product so safe that it does not require warning labels or child-resistant packaging.

● Can you use lake water with Spa Marvel?
Yes. If the lake water is cloudy due to tannins in the water, you will need to use spa shock and/or a clarifier to help in clearing it during the first few days.

● Where should my pH and alkalinity be?
pH should range from 7.8 to 8.2 (a range broader than required when using traditional spa treatment products). Spa Marvel tubs tend to, more often than not, sit with a pH of 7.8-8.2. Alkalinity should range from 80 to 120 ppm. Always adjust alkalinity first, then pH, using products available from your professional spa store.