Manual Caldera Vacanza-serie 2023 (page 32 of 40) (English)

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SUPPLEMENTAL WATER MAINTENANCE

Proper water sanitation and mineral balance (pH control) are absolutely

essential for a complete spa water maintenance program. Here are two

other popular water additives that are optional:

Mineral Deposit Inhibitors

As water evaporates from your spa and new water is added, the amount

of dissolved minerals will increase. (Minimize evaporation by keeping

the cover on the spa whenever possible.) The spa water may eventually

become “hard” (Calcium Hardness too high) enough to damage the

heater by calcifying its surface. Proper pH control can minimize this.

Normal soap build-up will require water replacement regularly enough

that mineral deposits normally are not a problem.

Occasionally, high iron or copper content in the water may produce green

or brown stains on the spa. A stain and scale inhibitor may help to reduce

these metals.

IMPORTANT: Well water may contain high concentrations of minerals.

The use of a low water volume, extra-fine pore water filter (in-line pre-

filter such as the CLEAN SCREEN pre-filter) will help to remove many of

the larger particles during the filling of the spa. In-line pre-filters can be

purchased at your local CALDERA dealer.

Foam Inhibitors

Spa water requires changing due to the buildup of soap in the water.

Typically, soap will cause the spa water to foam when the jets are used.

Soap is introduced into the spa water from two sources: users’ bodies,

which retain a soap residual after showering, and swimming apparel,

which retains soap after washing.

Foam inhibitors can suppress foam, but cannot remove soap from the

water. Soap is very difficult to remove from the water because soap is not

oxidized by any chemical added to the spa. Only ozone can oxidize soap.

Eventually the soap build-up in the water will be concentrated, resulting

in an unclean feeling on the bather’s skin, which is impossible to remedy.

When this occurs, it’s time to drain and refill the spa. Depending on the

soap input, the water should last about four months before needing to be

drained.

WATER TERMINOLOGY

The following chemical terms are used in this Water Quality and

Maintenance section. Understanding their meaning will help you to better

understand the water maintenance process.

Bromamines: Compounds formed when bromine combines with nitrogen

from body oils, urine, perspiration, etc. Unlike chloramines, bromamines

have no pungent odor, and are effective sanitizers.

Bromine: A halogen sanitizer (in the same chemical family as chlorine).

Bromine is commonly used in stick, tablet, or granular form.

Calcium Hardness: The amount of dissolved calcium in the spa water.

This should be approximately 50 -150 ppm. High levels of calcium can

cause cloudy water and scaling. Low levels can cause harm to the spa

equipment.

Chloramines: Compounds formed when chlorine combines with nitrogen

from body oils, urine, perspiration, etc. Chloramines can cause eye

irritation as well as having a strong odor. Unlike bromamines, chloramines

are weaker, slower sanitizers.

Chlorine: An efficient sanitizing chemical for spas. Watkins Wellness

recommends the use of sodium dichlor-type granulated chlorine. This

type is preferred because it is totally soluble and nearly pH neutral.

Chlorine (or Bromine) Residual: The amount of chlorine or bromine

remaining after chlorine or bromine demand has been satisfied. The

residual is, therefore,

the amount of sanitizer which is chemically available to

kill bacteria, viruses and algae.

Corrosion: The gradual wearing away of metal and plastic spa parts,

usually caused by chemical action. Generally, corrosion is caused by low

pH or by

water with levels of TA, CH, pH or sanitizer which are outside the

recommended ranges.

Halogen: Any one of these five elements: fluorine, chlorine, bromine,

iodine, and astatine.

MPS: Monopersulfate is the non-chlorine oxidizer used with the

FRESHWATERAg+ silver ion purification system. Not a sanitizer.

Nitric Acid: The formulation of nitric acid, a highly corrosive chemical,

is a byproduct of the ozone generating process. Nitric acid is produced

in very small quantities and is readily dissolved in the water stream with

ozone.

Oxidizer: The use of an oxidizing chemical is to prevent the buildup of

contaminants, maximize sanitizer efficiency, minimize combined chlorine

and improve water clarity. See MPS and Ozone.

Ozone: Ozone is a powerful oxidizing agent which is produced in nature

and artificially by man. Ozone forms no byproducts, oxidizes chloramines,

and will not alter the water’s pH.

pH: The measure of the spa water’s acidity and alkalinity. The

recommended pH for the spa water is 7.2 to 7.8. Below 7.0 (considered

neutral), the spa water is too acidic and can damage the heating system.

Above 7.8, the water is too

alkaline and can result in cloudy water, and

scale formation on the shell and heater.

ppm: The abbreviation of “parts per million”, the standard measurement

of chemical concentration in water. Identical to mg/l (milligrams per liter).

Reagent: A chemical material in liquid, powder, or tablet form for use in

chemical testing.

Sanitizer: Sanitizers are added and maintained at recommended

residuals to protect bathers against pathogenic organisms which can

cause disease and infection in spa water.

Scale: Rough calcium-bearing deposits that can coat spa surfaces,

heaters, plumbing lines, and clog filters. Generally, scaling is caused by

mineral content combined with high pH. Additionally, scale forms more

readily at higher water temperatures.

Sodium Hypochlorite (Liquid chlorine/bleach): Unstabilized (without

cyanuric acid) chlorine in liquid form. Very effective however it has a very

high pH and requires acid adjustment to maintain water parameters.

Never add acid directly to chlorine.

Super-Chlorination: Also known as “shock treatment.” Super-

Chlorination is a process of adding significant doses of a quick dissolving

sanitizer (“dichlor” is recommended) to oxidize non-filterable organic

waste and to remove chloramines and bromamines.

Total Alkalinity (TA): The amount of bicarbonates, carbonates, and

hydroxides present in spa water. Proper total alkalinity is important for pH

control. If the TA is too high, the pH is difficult to adjust. If the TA is too

low, the pH will be difficult

to hold at the proper level. The desired range of

TA in spa water is 40 to 120 ppm.

Water Quality and Maintenance

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