FUNDAMENTALS OF
WATER MAINTENANCE
• Testing: Test the water weekly or each time the spa is used with
convenient FRESHWATER 5-way Test Strips or more accurate liquid/
tablet reagent test kit per instructions. Critical parameters: sanitizer
level, pH, Calcium Hardness (CH), and Total Alkalinity (TA). Store test
equipment in a dark, cool, dry place to maintain potency.
• Water Filtration: The filtration used in HOT SPRING spas helps keep
water clean by circulating sanitizer and removing waste from the spa.
Regularly inspect and clean filters for peak performance
• Chemical Balance/pH Control: It is important to adjust the primary
water parameters (Total Alkalinity, Calcium hardness, pH) into the
recommended ranges so that they are stabilized or balanced. Balance
the water chemistry every
time you fill the spa with
new water and then during
the life of that body of
water. Keeping the water in
balance prevents damage
by holding the pH in a
safe range and preventing
calcium scale formation
on spa equipment. A low
pH can damage metal
components whereas a high
pH can cause high levels of
calcium to form scale. Your
dealer should provide a
detailed water chemistry orientation soon after your new spa is filled for
the very first time.
• The following three water components must be kept in balance to avoid
damage to the spa. Do balance these components in the order they
are listed here as each will help you balance the next using a minimum
amount of chemicals.
1. Calcium Hardness (CH) – CH is the measure of the amount of
dissolved calcium in the water. Low levels can make the water
corrosive and high levels cause scale formation of spa components.
The recommended CH reading is between 75 - 150 ppm. A
hardness between 25 - 75 ppm is recommended with a Salt System.
If the CH level is too high, lower it with the VANISHING ACT
calcium remover per instructions. Once in balance, the CH reading
normally remains stable until new water is added. Great care must
be taken when filling the spa from a water softener to ensure that the
calcium remains in balance and avoid damage to the spa.
2. Total Alkalinity (TA) - TA is a measure of the water's ability to resist
changes of pH or buffer capacity. A low TA allows the pH to fluctuate
easily. The recommended TA reading is between 40 - 120 ppm.
To raise the TA, use FRESHWATER pH/Alkalinity Up (sodium
hydrogen carbonate). To lower the TA, use FRESHWATER pH/
Alkalinity Down (sodium bisulfate). Once the TA is balanced, it
normally remains stable until the next drain/refill. We recommend
you check the TA reading once per month. Raising/lowering the
TA may cause the pH readings to fluctuate widely. Ignore the pH
readings on the test strip while you are balancing the TA.
3. pH - The pH is the measure of the acidity and alkalinity. Maintaining
the proper pH level will optimize the effectiveness of the sanitizer,
preventing damage to the spa and physical discomfort for spa users.
A low pH dissipates sanitizer, causes corrosion, and irritates spa
users. A high pH level will neutralize sanitizer, promote scaling and
cloud water. The recommended pH reading is between 7.2 - 7.8. To
Water Quality and Maintenance
English
Spanish
ALKALINE SPA
ADD pH
WATER
DECREASER
(SCALING
TO LOWER
ZONE)
pH
COMFORT
ZONE
IDEAL
ADD pH
ACIDIC SPA
INCREASER
WATER
TO RAISE
(CORROSIVE
pH
ZONE)
French
lower the pH level, use FRESHWATER pH/Alkalinity Down (sodium
bisulfate). To raise the pH level, use FRESHWATER pH/Alkalinity
Up (sodium carbonate).
• Water Conditioners: Spa fill water varies from location to location and
user to user, therefore it is important to consult with your dealer for an
appropriate program.
a. VANISHING ACT – High levels of calcium and some minerals
can be removed from the water with the single use VANISHING
ACT. High calcium levels can cause scale formation on the spa
equipment and shell.
b. CLEAN SCREEN pre-filter –The CLEAN SCREEN pre-flter
should be used at every fill and top-off to remove contaminants
from the fill water, especially iron, copper, and manganese. Many
water sources including well water contain high concentrations of
minerals that can cause staining of the shell and plastics.
c. Stain and Scale control – For water high in calcium and minerals,
it may be necessary to use an anti-scalant like Stain and Scale
control. As water evaporates from your spa and new water is
added, the amount of dissolved minerals like calcium, copper,
iron, and manganese will increase. (Minimize evaporation by
keeping the cover on the spa whenever possible.) High iron or
copper content in the water may produce green or brown stains
on the spa.
d. Foam Inhibitors - Soap is introduced into the spa water from
users' bodies and swimming apparel and can cause the spa
water to foam when the jets are used. Low levels of calcium
hardness (soft water) can increase foaming. Although ozone and
Salt Systems can oxidize soap residual, it may become necessary
to add Foam Inhibitors to suppress the foam. Excessive soap in
the water may require a water change to resolve.
• Oxidizers: Ozone and Monopersulfate (MPS) are oxidizers used to
prevent the buildup of contaminants, maximize sanitizer efficiency,
minimize combined chlorine, and improve water clarity. They are
to be used in conjunction with EPA registered sanitizers. The
FRESHWATER III high output ozone system uses Corona Discharge
technology to produce a high concentration of ozone which is injected
into the spa water 24 hours per day. FRESHWATER Chlorine-Free
Oxidizer, Monopersulfate (MPS) is a granular oxidizing chemical.
• Sanitizers: Maintaining the recommended residual level of an EPA
registered sanitizer at all times will decrease the occurrence of unsafe
bacteria and viruses in your spa water. The recommended Free
Available Chlorine (FAC), the amount of available chlorine sanitizer,
is 3.0-5.0 ppm. A low FAC can allow bacteria and viruses to grow
rapidly in the warm water, and a high FAC can cause discomfort to the
user's eyes, lungs, and skin. Each sanitizer carries its own instructions
regarding how much to use and when to add it to the spa water.
Consult your dealer for their recommendations and instructions on
proper sanitizing of the spa.
a. FRESHWATER Salt System
b. FRESHWATER Concentrated Chlorinating Granules
c. Sodium Dichloro-s-Triazinetrione (sodium dichlor or chlorine)
d. Liquid chlorine (sodium hypochlorite)
e. Brominating Concentrate (one step granular bromine).
f. BaquaSpa
®
(please consult your BAQUASPA manual for
instructions on the use of this product).
IMPORTANT: DO NOT use tri-chlor chlorine, bromo-chloro-dimethyl-
hydantoin (BCDMH), or any type of compressed bromine or chlorine,
acid or any type of sanitizer which is not recommended by WATKINS
WELLNESS.
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