Chapter I: GUIDANCE ON WATER TREATMENT

I. SWIMMING POOL QUALITY STANDARDS

1.1 Input water standards

Water standards Swimming pools are provided under a number of bases and regulations such as:

– Based on water quality standards of Vietnam TCVN5942-1995

– Based on the standards for the quality of water supplied to the swimming pool of the International.

– Based on the regulations of the quality of water to the pool of the swimming pool center.

From some of these bases, we can provide a table of water quality standards to the  pool, to ensure the health of the people and to facilitate good water treatment.

Chemical standard in  swimming pool

II. Basic regulations in water treatment:

2.1 pH balance

+ If the pH is too low, the equipment in the tank is prone to erosion, reducing the efficiency of the filter, affecting the skin and eyes (skin irritation, burning eyes)

+ pH too high: turbid water, ineffective treatment, cost to maintain the cleanliness of the tank expensive, affecting the skin and eyes (skin irritation, the eyes), the appearance of heavy, heavy water.

– Success or failure of water treatment The pool also depends on the pH balance in the water (automatically adjust the pH in water)

– Things to know:

         pH reflects the acidity or alkalinity in water

         + PH may vary from 0 to 14

         + The pH of 7.0 is 7.0 in the neutral pool at about 7.2.

         Less than 7.2 will expose iopn H + , which is acidic and will turn yellow in the pH test tube

         Over 7.2 will lack H + ions  at this time the water will be alkaline and will turn purple in the test tube pH

         The pH must be within 7.2; 7,6. At that time, the water will be clear, easy to maintain, and will save maintenance maintenance.

2.2 Adjust pH before treatment

         Use a water test kit twice a week

        If more than 7.6 need to drop pH down to lower pH

         Less than 7.2 need to drop pH plus to increase the pH to about 7.2 to 7.6

         To increase the pH to 0.2 pH units need 1kg pH plus / 100m 3

         To reduce the pH to 0.1 pH units need 1kg pH minus 100m 3

         Example: Swimming pool 50m 3  with a pH of 7.8

         To reduce the pH to 7.4 = 0.4 / 100m 3  = 4kg

                                               = 0.4 / 50m 3  = 2kgpH minus

2.3 Anti-moss, algae

         Need to prevent the rapid proliferation of algae. In many cases, chlorine does not work and moss becomes immune.

         It is important to combine two important methods:

         A.  Wash the bottom of the tank, walls, and stones thoroughly to prevent formation of algae.

         B.  Regulation of use of algae in the tank depends on the type of treatment

There should also be sufficient time to filter, clean and dry clean filter, all these factors play an important role in preventing the development of algae.

III. CHEMICALS USED FOR SWIMMING POOLS

3.1 Shock Chlorine

Shock chlorine tablets are used in two cases:

– When the water in the pool had loose phenomenon: dosage is 1 tablet for at 1m 3  water, chlorine tablets should be placed in the filter basket and processed until achieving the standard chlorine

– Periodic maintenance doses for swimming pools: 10 tablets for 50m 3  for 2 to 3 days

The dose is just relative. Therefore, it is necessary to check the pH, chlorine and number of swimmers as well as water temperature.

3.2 Long lasting chlorine

This chlorine is concentrated (the minimum chlorine available is 90%) and can be treated with chlorine regularly. Chlorine treatment does not affect pH, does not interfere with the circulation of the machine and does not muddy the pool.

Chlorine dose to maintain: 1 tablet for 40m water per week

Dissolve partially or dissolve the tablet, chlorine tablets to treat water for 5 – 7 days. Remember to put the chlorine in the filter basket

The amount of chlorine given is relative, so it is necessary to check the pH or chlorine, the number of swimmers, the water temperature before the decision on the chlorine dose to the lake.

3.3 pH minus

pH – is used to ensure the balance of nutrients in the water and help the water treatment achieve the best results. The pH required is maintained in water and from 7.2 to 7.6, pH is used when the pH in water exceeds the allowable (greater than 7.6)

The use is shown in section 2.2. However, it is necessary to remove the chemicals into the filter basket. Dose is sometimes relative, it depends on a lot of different factors.

3.4 pH plus

pH + to ensure water balance and help the  water treatment is  best.

Used when the pH in water is lower than 7.2

The usage is shown in section 2.2.

3.5 JD flash.

This is algae insecticide used 1 liter to 10 m 3  of water per month

Preparation: This algae is used with chlorine tablets, algae killers are used for a fast disinfectant.

Attention:

– However, the dosage of chlorine can cause the reaction with algae. Therefore, it is necessary to pour the algae in front of the nozzle.

– Gloves must be worn when handling water, and algae containing bottles must be tightly closed and not tilted.

You can contact your dealer for more details.

3.6 JD kit 4 in 1

JD 4 in 1 is used regularly for swimming pools. Use 1 JD 4 in 1 box each week and place it correctly in the filter basket. Each dosage is guaranteed:

– Cleansing chlorine

– Kill algae

– Made in water

– Regulate the treatment of water

Using:

JD 4 in 1 can be processed for swimming pool with the capacity of 50m 3  water / 1 week. In addition, it is necessary to place JD 4 in 1 into the filter basket to ensure efficient water treatment

3.7 JD shock

JD shock is a chemical disinfectant with a concentration of 65 to 90%. The stabilizer component inhibits the evaporation of water

Property: JD shock in small particle state, white dust,

Packed in 2 kg package, 45 kg carton, 50 kg carton

Use: depending on the water conditions can use from 200 gr to 500 gr for 100 m 3

3.8 Flocoulant:

An extremely fast deposition agent that is used in combination with algae use once a week or when algae are present

Dose can be used from 1l / 100m 3  to 2l / 100m 3 if required.

3.9 Flour deposition

Similar to flocoulant, but with a dosage of 1.2 kg / 100 m 3

IV. The causes and solutions for pool water treatment.

4.1 Green water contains algae

The moss is very easy to attach to the wall of the tank, the bottom of the tank, the wall. So you have to clean them often at this time.

Note: Stormy weather is a good condition for moss growing

4.2 Dark blue water

4.3 turbid water

4.4 Water up blue, brown, black, red (transparent)

V. ADVICE TIPS ON WATER TREATMENT

5.1 The water in the tank has an odor of chlorine

Anxiety and Chlorine deficiency

– Chlorine: Heavy chlorine smell is due to chlorine being evaporated.

– Solution: Use immediate solution (10g / m 3 ) and filtering machine

5.2 pH is higher than 7.6

Chlorine will lose its effect. Water will become alkaline and deposited heavy. In case of heavy water, adjust the pH to 7.2.

5.3 Restore water

Minimum amount of water in the tank must be changed once a year, consider adjusting the level of Chlorine, mineral salt accordingly. Normally, when the winter comes, half of the water in the tank must be drained, including indoor swimming pool.

5.4 Economical filter

The more cost-effective the filter is

Water circulates in a circular motion

– Water condensed into a blue circle

5.5 Filter at night and during the day

When photosynthesis occurs, do not worry about running the filter all day. In the evening, it is turned off by night

5.6 In the case of long-term absences, check:

– Energy supply for the filter (may have to re-adjust the timer system)

– Adjust the filter system

– pH balance in water

– Adjust the content of JD Flash or Chlorine

– Do not cover the tank.

5.7 Filter bags

6 or 15 micron filter bag

Do not let the algae, sand, precipitate otherwise the pump will fail

5.8 Water into the tank

It is forbidden to get water from ponds and lakes, because they contain many microorganisms and harmful substances in the lake.

Collect