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A SIMPLE GUIDEWhile both pools and spas require chemical additives to sanitize and condition the water, there is a big difference between cold water and hot water chemistry. In many cases the chemicals used are the same, but in some instances they are radically different. Never use pool chemicals in a spa without first making sure they are compatible with hot water! Like pool water, when a spa is filled with your garden hose it is generally chlorinated and fluoridated. But left untreated, water is a perfect host for all kinds of living organisms and mold. Spa water, because it is kept at a high temperature, is particularly susceptible to organic growth. The most important chemical your spa needs is some form of sanitizer to kill bacteria. There are several different types of sanitizers available, which we all cover shortly. Some of the other chemicals you may need are listed below: OXIDIZER/SHOCK: Used to burn off organic waste, kill algae (uncommon in spas), and to keep the water clear. PH ADJUSTERS: Used to raise or lower the pH, which is a measurement of how acidic or basic the water is. Normal pH should be between 7.2 and 7.8 (the pH of the human eye is around 7.5). At this range sanitizers work better, scaling and corrosion is reduced, and skin and eye irritation is avoided. TOTAL ALKALINITY ADJUSTERS: When alkalinity is correct, it helps maintain proper pH levels. ALGAECIDE: Used to prevent algae, or to kill algae when used with shock. Algae is usually not a problem in spas, but occasionally occurs in summer months when spa temperatures are kept lower. CLARIFIER: Clears up cloudy water. SEQUESTERING AGENTS: Used to remove metal from the water, preventing discoloration or staining. Primarily needed when well water is used to fill the spa. SANITIZERSThere are primarily two standard sanitizers and couple of new, alternative sanitizers used in spas. Chlorine: While there are several types of chlorine that may be used in swimming pools, the only kind compatible with hot water is di-chlorine, or di-chlor for short. It is available in granular form specifically packaged for spas, and is also sold for pools. Use approximately 1.5 oz. per 500 gallons of water weekly. You can contact us if you have any questions on your water chemistry.
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