Determining Pool Size (Gallons Of Water In Your Pool); Chemistry You Need To Know - Zodiac AquaPure EI 1APURE35C Guide D'installation Et D'utilisation

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4.2 Determining Pool Size (Gallons of
Water in Your Pool)
• Rectangular Pools
Average length (feet) x average width (feet) x
average depth (feet) x 7.5 = gallon capacity.
• Circular Pools
Diameter (feet) x diameter (feet) x average depth
(feet) x 5.9 = gallon capacity.
• Oval Pools
Long diameter (feet) x short diameter (feet) x
average depth (feet) x 5.9 = gallon capacity.
• Sloping Sides
Multiply total gallons by 0.85 = gallon capacity.
4.3

Chemistry You need to Know

• Chlorine Stabilizer (cyanuric acid) is needed
to maintain proper levels of chlorine. Most non-
stabilized chlorine is destroyed by the UV radiation
from the sun within two (2) hours. Chlorine
stabilizer should be maintained between 10 - 50
ppm. For indoor pools, it is not necessary to add
chlorine stabilizer to the swimming pool water.
• Nitrates can cause extremely high chlorine
demands and will deplete chlorine from your
swimming pool. In some cases nitrates may even
lower your chlorine levels to zero. Your local pool
professional can test for nitrates. Make sure nitrates
are not present in your pool.
• Metals (some metals) can cause loss of chlorine and
stain your pool. Have your local pool professional
check for metals and recommend methods of
removal.
• Chloramines should not be present in pool
water. When organic materials combine with free
chlorine, chloramines are formed. This ties up the
free chlorine in your pool and does not allow the
chlorine in your pool to disinfect. Chloramines
also cloud pool water and burn the eyes. Shock to
remove chloramines at the initial startup of the pool.
• Super Chlorination burns out the organic material
that has combined with chlorine which frees the
chlorine for sanitizing. Super Chlorination is
accomplished by raising the chlorine level quickly
and dramatically. To super chlorinate the pool using
the Zodiac AquaPure Ei Series APURE35C chlorine
generating device, set the chlorine production to
100% and then set the pump and the cell to run for
24 hours.
Zodiac AquaPure Ei Series APURE35C
® ®
• Shocking (Superoxidation) is also a means of
burning out the organic material that has combined
with chlorine. This method involves the manual
addition of chemicals (use a registered or scheduled
source of sodium dichlor, calcium hypochlorite,
liquid chlorine or trichlor) to quickly raise the level
of chlorine. When the chlorine level is quickly
raised to 5 - 15 ppm the pool water is said to have
been shocked.
nOTE On initial startup of a pool, it is best to shock
using either a shock treatment or a registered
or scheduled source of sodium dichlor, calcium
hypochlorite, liquid chlorine or trichlor available at
your local pool supplier.
Never use dry acid to adjust pH in arid geographic
areas with excessive evaporation and minimal dilution
of pool water with fresh water. A buildup of by-
products can damage the electrolytic cell.
• The pH Condition resulting from the operation of
a salt water chlorination system is close to neutral.
However, other factors usually cause the pH of
the pool water to rise. Therefore, the pH in a pool
chlorinated by a salt water system tends to stabilize
at approximately 7.6. If the pool pH rises above 7.6
have a pool professional test to see if other factors
such as high calcium hardness or total alkalinity are
the cause and then balance accordingly.
• Total Dissolved Solids (TDS). Adding salt to pool
water will raise the TDS level. While this does not
adversely affect the pool water chemistry or clarity,
the pool water professional testing for TDS must be
made aware salt has been added for the sanitizing
system. The individual performing the TDS test
will then subtract the salinity level to arrive at the
correct TDS level.
• New pool water in a recently filled or newly
refinished pool may contain undesirable matter
which could interfere with the salt water
chlorinator's ability to sanitize properly. Make
sure the water is tested by a pool professional and
properly balanced before turning on the chlorinator
system. New plaster pools have a constant acid
demand for six (6) months. Test often and maintain
a proper pH to avoid excess scaling of the cell.
• Sequestering Agents can be used to compensate
for source water which may have unusually
high calcium hardness. High calcium hardness
can contribute to scale formation in the pool.
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