Marquis 530 Manuel du propriétaire télécharger pdf (Page 58)

spa care and enjoyment guide

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. The

ideal pH range is 7.2 - 7.8. 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.

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 Increaser and Alkalinity & pH

Decreaser 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 Decreaser

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 and in most cases tap water is

fine. 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 buildup 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 Increaser. Most authorized

dealers can test the calcium hardness of your water.

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Marquis 530 Manuel du propriétaire Page 58

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