ACE® Salt Water System

There is no other system like it.

You can spend less time worrying about water care and more on what matters most – true piece of mind.

This exclusive system uses a diamond electrode to generate natural sanitizers from a little bit of salt added to the water. The end result is a soft and silky soaking environment that feels exceptional and reduces the dry, irritated skin from more traditional water care products.

The ACE salt water system automatically creates five powerful cleaners that keep your spa water clean and fresh for longer, without harsh chemicals.

Cleans Spa Water Differently

The ACE system cleans spa water differently than any other salt water system, or any traditional water care program. The ACE system uses a patented diamond electrode, which allows the system to break apart water molecules and create a powerful oxidizer called Active Oxygen.

Active oxygen goes to work to breakdown and remove bacteria and impurities in the spa water completely-leaving behind only water and carbon dioxide.

Once the water is clean, then the active oxygen will pair with sodium chloride (salt) that has been added to the water to create the chlorine sanitizer.

Since the ACE system will only produce chlorine after the spa water is clean, it may take a day (or longer) to see a measurable amount of chlorine on your test strip. If you do not get a chlorine reading, that is an indication that the ACE system is hard at work cleaning the water.

Eliminates Side Effects

Traditional Chlorine

Most spas and hot tubs are maintained using traditional chlorine water care. Chlorine is an approved sanitizer for spas and hot tubs. Chlorine will combat bacteria and contaminants in the spa, and provide you with peace of mind that spa water is clean and safe. However, bottled chlorine can leave spa owners with a number of unappealing side effects.

Eliminates Byproducts

When chlorine attacks contaminants in the spa water, it results in the creation of chlorinated byproducts, or chloramines. The chloramines are what generally cause the strong chlorine odor and irritating side effects that are often associated with hot tubs. The ACE system cleans the spa water differently. The Active Oxygen breaks down contaminants completely, eliminating those byproducts that impact the quality of spa water.

Minimizes Stabilizing Acid

Bottled chlorine also contains an acid, which is necessary to stabilize the chlorine. With traditional water care, bottled chlorine is added to the spa at a minimum of once a week, and in many cases with each use – which could be daily. Each time the bottled chlorine is added, the spa owner is inadvertently adding more acid to the spa water. The increasing level of acid in the spa water also contributes to the dry skin, red eyes, and irritation that some people experience from spa water. With the ACE system there is only a very small amount of bottled chlorine added to the spa, hence eliminating these side effects.

Caring for your spa water with the ACE system consists of:

  • Balancing spa water at start-up
  • Testing weekly to ensure water remains balanced and the chlorine level is within the recommended range
  • Conducting the 30-day check up
  • Cleaning the cell every 90 days
Hot Spring Spas
ACE Salt Water system

Frequently Asked Questions

How much salt is in a salt water hot tub with the ACE system? Will the water taste salty

The ACE system requires very little salt. It is estimated that humans can taste salt in water at approximately 3,000-4,000 ppm. The target salt level when using the ACE system is only 1,750 ppm. Take a look at how the salt level of water treated with the ACE system compares to the average salt level of other liquids.

Liquid Average Salt Level
Sea Water 35,000 ppm
Tears 6,000 ppm
Salt water pool 3,000-5,000 ppm
ACE spa water 1,750 ppm

How often do I need to add salt?

The ACE system will continually generate chlorine from the salt initially added to the water. The hot tub owner only needs to add more salt when they drain and refill the hot tub, or after topping off the water significantly.

What is Active Oxygen?

Active Oxygen is a term used to describe a powerful oxidizer (OH-) derived from water (H2O), and is different from oxygen (O2) derived from Ozone (O3).

How is Active Oxygen created?

Active Oxygen is created when energy transferred into the water breaks apart water molecules. Without the diamond electrode there is not enough energy to split apart water and create Active Oxygen — no other salt water chlorine system can create this oxidizer.

What makes Active Oxygen so special?

The benefit of Active Oxygen is that it breaks down waste and contaminants completely with oxygen, leaving behind carbon dioxide and water. It does not leave behind chloramines or other byproducts that can cause hot tub water to be irritating to the skin and eyes or cause a strong odor.

Is the ACE system technology used anywhere else?

This process, called advanced oxidation, is used to treat water in a variety of other industries. It’s also used to purify ground water and waste water, as well as to treat water used in food manufacturing facilities and in breweries, to name just a few other applications.

Why is calcium hardness a concern for hot tubs?

The accumulation of scale caused by high levels of calcium hardness can be detrimental to hot tub components like the jet pumps and heater, as well as to the electrodes within the ACE system. All hot tub owners can benefit from the Vanishing Act calcium remover, which helps to protect hot tub components and makes hot tub water feel softer.

How can I decrease calcium hardness in spa water?

The Vanishing Act calcium remover is the best option for decreasing hardness levels and achieving the ACE system’s recommended calcium hardness level (50 ppm) for improved operation and minimized cell cleaning. Removing calcium from the water reduces the need for additional chemicals, like Stain and Scale, which only temporarily treat calcium in the water.

I have very hard water; what’s the best way to fill my hot tub?

The On The Go portable water softener is an effective and cost-efficient way to avoid issues that can result from having high levels of calcium hardness. The On The Go can be used to fill and top off the spa with soft water, and again when you eventually drain and refill. The On The Go can be reused and recharged over and over again, so it will last the life of your spa.

What if my calcium hardness levels are high?

If scale does accumulate on the ACE system electrodes, it can easily be removed by soaking the ACE cell in a simple solution of pH Down and spa water for 10 minutes. An empty bottle with cell cleaning instructions on the label is included with the ACE kit for convenience. The cell should be cleaned this way once every three months as preventive maintenance. FreshWater cell cleaning solution is also available.

How often do I need to change my spa water with the ACE system?

The number of water changes needed per year varies by owner. The ACE system helps reduce the amount of bottle products that are added to the water and breaks down waste and contaminants completely. In doing so the system helps minimize the level of total dissolved solids in the water, helping hot tub water to last longer — up to 12 months.

How long does the ACE cell last?

The cell is designed to run for a finite number of hours; the ACE cell does not operate 24 hours a day. The amount of time the cell is working each day is determined by the size of the spa and how often it’s used, so the life of the cell will vary. On average, the cell will last between 2 and 3 years.

Does the ACE system cost more than other water care systems?

Over time, we estimate the cost of water care using the ACE system to be slightly more than traditional approaches to water care. However, the ownership experiences provided by the ACE system are very different. The ACE system eliminates the need to manually dose the hot tub water with sanitizer, and eliminates side effects associated with spa water care. Your Hot Spring dealer can help you understand the cost differences.

What spas are available with the ACE system?

The ACE salt water sanitizing system is compatible with all new Hot Spring Highlife® Collection, Highlife Collection NXT and Limelight® Collection spas.