There are three things necessary for maintaining clean safe water in your Spa ;

Water has to be circulated regularly; it cannot be stagnant.

Water has to be filtered to remove particulate and debris.

Water has to be sanitized to kill organisms like algae, ba
It is critical to maintain proper water balance to protect the spa heater and other components from damage. Damage to the spa surface and equipment caused by poor chemical or harsh chemical treatment is not normally covered under a Hot Tubs warranty. Discoloration of jet faces, valves and controls are an indication of poor chemical maintenance or exposure to the sun. cteria and virus.

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To sanitise your spas water, three things are required:

The water must be balanced so the sanitizer can work and spa equipment is protected.

Shock to oxidize organics and maximize sanitizer efficiency.

Maintain a proper level of sanitizer at all times.


Water balance is the interrelation of factors that determine the quality of the spa water. The effectiveness of chemicals and other additives are dependent on all these factors working together or “in balance”. The primary elements to water balance are the calcium hardness, total alkalinity and pH. Keeping the pH balanced is the most critical component of water balance. Calcium hardness and total alkalinity act as buffers to stabilize the pH. When they are properly adjusted, the pH will be stable and easy to maintain.

The pH is a measure of the relative acidity and basicity of the water. It is generally recognised within the industry that the ideal pH range is 7.4 - 7.6. When the pH falls below 7.2, the water can become corrosive. Low pH can cause damage to metal in the control system and heater, excessive sanitizer consumption, and skin irritation. A pH above 7.8 can be scale-forming and allow metals or minerals in the water to form deposits and stain spa surfaces. pH above 7.8 can also cause eye and skin irritation.

Total Alkalinity

Alkalinity acts as a buffer to prevent the pH from changing as other substances are added to the water. Stability of the pH is directly related to the alkalinity. The alkalinity should be between 80 - 140 ppm. Alkalinity below 80 ppm makes it difficult to stabilize the pH. Alkalinity above 140 ppm may increase the pH and cause cloudy water, scaling, and decreased efficiency of the sanitizer.

Note: Alkalinity & pH Increase and Alkalinity & pH Decrease will affect both the pH and alkalinity. Generally, smaller additions will change the pH and have a very minor effect on the alkalinity. Larger additions will also affect the pH, but will have a much greater effect on the alkalinity. (Example: If the pH is very high and the alkalinity is within range, adding a few smaller doses of pH and alkalinity Decrease instead of one large dose will reduce the pH with little effect on the alkalinity.)

Calcium Hardness

Do not use soft water in your spa. It is critical to have calcium in your water. The ideal range of calcium is between 200 – 300 ppm. The calcium hardness is normally adjusted when filling or refilling after draining the spa. High calcium levels can cause scale build-up on spa surfaces and equipment. Your spa can be protected against high calcium by using Metal & Stain Remover per the directions on the container. Low calcium levels can cause spa water to become highly corrosive and damaging to the equipment components and plumbing. To raise calcium levels, use Calcium Hardness Increase.


When initially filling or refilling your spa, follow these steps to achieve proper water balance.
IMPORTANT! Always follow instructions on the chemical container when adding chemicals.

1. Test the spa water using a test strip or test kit. Determine the pH and alkalinity of the water.
2. If adjustments are needed for the pH and/or alkalinity, always balance the alkalinity before balancing the pH. The product(s) you should use to adjust pH and/ or alkalinity are pH Alkalinity Increaser or pH & Alkalinity Decreaser. Make any additions per the directions on the bottle and then test and repeat if necessary until all readings are in the desired range.
3. Increase the calcium hardness if necessary.


Initial Treatment

Shock the spa using granular Chlorine Sanitizer or non-chlorine Spa Shock. Add directly to the spa per the instructions on the container. For the initial treatment, Chlorine Sanitizer is preferred as it will also establish a residual of sanitizer. Fun Fantastic also offer Hot Tub and Spa Water treatment Starter Packs.

Maintenance Treatments

Once bacteria and other wastes are neutralized by the sanitizer, they stay in the water unless oxidized or shocked. Often called chloramines or bromamines, they create dull, cloudy water and can cause odor and eye or skin irritation. Shock treatment rids your spa of these wastes for clear, sparkling water. Shocking with non-chlorine Spa Shock or granular Chlorine Sanitizer is recommended once a week or whenever the water appears dull or cloudy or has a strong odour. Our rapid non-chlorine Spa Shock allows use of the spa 15 minutes after shock treatment. Bromine is another popular choice. It is a relatively heavy and stable sanitiser that is well suited to hot water. It is effctive at killing bacteria over a wide pH range. When using Bromine you will also need to shock treat your spa water with Energize on a weekly basis.

NOTE: A strong bromine or chlorine odour typically indicates the spa needs to be shocked – not that there is too much bromine or chlorine in the water. A properly balanced spa that is shocked regularly will not have an odour.


To see the full range of Fun Fantastic Spa & Hot Tub Water Treatments, please click here.