Specifications

Pool Water Maintenance & Analysis
When it comes to pool management, nothing is more important
than the chemistries of your water. A well-maintained pool with a
good chemical balance keeps the algae away, ensures long lifespan
for your pool equipments and provides for an inviting swim. Here are
some parameters which you should take note of when maintaining
your pool:
1. pH
pH is the measure of how acidic or alkaline your water is. It is the most
important parameter in pool water electrochemistry and aects all the
other parameters in your water.
When pH is too low (water is too acidic)
• Corrosion of metallic ttings and etching of plaster walls • Stains
from metal rust • Chlorine residuals dissipates quickly • Eye and skin
irritation occur
When pH is too high (water is too alkaline)
• Cloudy water • Scale deposits • Overworked ltration • Reduced
Chlorine eciency
| Ideal pH Level: 6.8 - 7.8 pH |
Eutech oers a series of waterproof pH testers that measure up to
2-decimal accuracies and allow you to measure temperature at the
same time.
2. Total Alkalinity
While pH is a measurement of the hydrogen ion concentration, alkalinity
measures the ability of a solution to neutralize hydrogen ions. In other
words, it is the measure of water’s resistance to pH change, or how
“sensitive” the pH level of your water is to changes.
When alkalinity is too low
• pH level is extremely sensitive to introduction of chemical or impurities
in the water. This makes it dicult to control and stabilize the pH level
of your water
When alkalinity is too high
• pH level becomes resistance towards change. This makes it dicult to
adjust your pH level
| Ideal Alkalinity Level: 80 -150 ppm |
3. Total Dissolved Solids (TDS)
TDS refers to the amount of dissolved materials in your pool water.
In other words, the lower your TDS level, the better your pool water
quality. TDS is inuenced by many factors, among which includes the
chemicals you’ve added to balance the water chemistries. Although a
TDS level of 4,000 ppm has been observed in clean water on occasion,
the recommended TDS level should not exceed 1,500 ppm.
When TDS level is too high
• Low water hygiene level • Staining of pool surfaces • Scaling • Hard water
| Ideal Alkalinity Level: 80 - 150 ppm |
TDS measurement is a simple one-step process with Eutech’s
TDS waterproof pocket testers. User-friendly and so light, it oats
on water!
4. Calcium Hardness & Lime Balance
Calcium hardness refers to the amount of dissolved calcium salt in
your water.
When calcium is too low
• Your pool water may leach calcium from your walls, causing pits to
form in the plaster surface
When calcium is too high
• Scales formation and clouding of water
5. Disinfection
Chlorine – Chlorine is the most common sanitizer for swimming pools.
Proper disinfection is paramount to preventing water-borne diseases
from spreading between swimmers and prevents the growth of
unwanted algae and bacteria in your pool.
Chlorine which has yet to react with other substances in the water is
called Free Chlorine.
Chlorine which has already reacted with other substances and is no longer
available to oxidize organic substances is called Combined Chlorine.
Free Chlorine = Free Chlorine + Combined Chlorine
On the contrary to common beliefs, it is a lack of chlorine which results
in the strong, pungent smell emitted by combined chlorine. Sucient
chlorine added will dissipate this odor. On the other hand, excessive
amount of chlorine present can cause eyes and skin irritation and pose
as a health hazard.
| Ideal Chlorine Level: (Total) 0.5 - 2.5 ppm ;
(Free) 0.5 - 2.5 ppm ; (Bounded) < 1.0 ppm |
Eutech’s C 401, C 301 and C 201 colorimeters measure free and
total chlorine over a range of 0 - 6 mg/L.
Bromine – Bromine is very similar to chlorine in terms of chemical
structure. However, because of its high boiling point, bromine is less
reactive than chlorine and hence more stable. As a pool disinfectant,
bromine has many advantages over chlorine – it has fewer odors, is
less likely to cause eyes and skin irritation and more importantly, its
eciency as a sanitizer is unaected by pH uctuations. However, the
higher cost of bromine over chlorine makes it a less popular option for
pool owners and operators.
Measure bromine in 3 easy steps with Eutech’s C 104 colorimeter
which provides a range of 0 - 13.5 ppm.
Ozone – Ozone is one of the strongest and most rapid oxidizer available.
It is odorless, does not cause eyes or skin irritation and does not pose as
a health hazard. Although more expensive as a disinfectant, ozone does
not require any stabilizer and causes neither scaling nor corrosion. In
view of this, many top spas and pool owners are beginning to recognize
ozone as a more economical solution to pool sanitizing in the long run
over chlorine.
Eutech’s C 105 colorimeter provides for fast and simple ozone
measurement over a range of 1.4 ppm to 4.1 ppm.
6. Balancing Your Pool Water
The chemical make-up of your water should strike a harmonious balance.
To balance your chemistries, measure and award points to each of the
parameters in table 1.1. Perfectly balanced water should obtain a score of 12.1.
Pool maintenance can be a breeze in the long run with a proper
maintenance routine in place. The right water treatment will keep your
pool water algae-, bacteria- and pollution-free. More importantly, it
keeps your water safe for a dip with your family.
Applications
page | 95
pH Temperature Alkalinity Calcium Hardness
6.8 = 6.8 20 °C = 0.50 50 = 1.70 50 = 1.3
6.9 = 6.9 22 °C = 0.55 75 = 1.90 100 = 1.6
7.0 = 7.0 24 °C = 0.60 100 = 2.00 150 = 1.8
7.1 = 7.1 26 °C = 0.65 125 = 2.10 200 = 1.9
7.2 = 7.2 28 °C = 0.70 150 = 2.20 250 = 2.00
7.3 = 7.3 30 °C = 0.73 175 = 2.25 300 = 2.10
7.4 = 7.4 32 °C = 0.76 200 = 2.30 350 = 2.15
7.5 = 7.5 34 °C = 0.80
7.6 = 7.6 36 °C = 0.82
38 °C = 0.85