How to solve green pool water? Yuck.

How to solve green pool water? Yuck.

What is green pool water?

Lack of maintenance leads to overgrowth of microalgae (algal blooms), causing the pool water to turn green.

Fortunately, there are multiple ways to clean swimming pools with green water today, which allows people to restore their pools without any inconvenience, as there are even multiple ways to clean green pools without emptying, which is a problem for most people. more comfortable.

Click on the specific entry - Pond algae, where you'll learn about why algae appear in your pond and the type of algae determined by their color, so you can deal with them unambiguously.

What bad result will this bring?

A. Poor maintenance produces a rather unpleasant appearance.

B. Causes multiple infections, such as otitis media - this is because in general, pools with green water they tend to accumulate many pathogens.

How can solve the problem to clear the green water from the pool?

#1 Adjust green pool water to correct

1) Destructive algaecides

Algaecide: Fast and efficient removal of algae (green algae, black algae and mustard algae) through the synergistic action of chlorine

2) Green Pool Shock Treatment

Shock Therapy: Effectively eliminates algae in the right circumstances.

3) Cleaning brush

Not all pool brushes are created equal! This applies to all pool surfaces.

It is recommended to choose to buy according to the actual situation:

There are brushes for lined, vinyl, fiberglass, acrylic, or painted pools, brushes for tile, plaster, or concrete pools, and removable pool brushes

4) Swimming pool anti-phosphorus agent

Pool Anti-Phosphate is a natural product that reduces phosphate levels in swimming pools

5) Slow-dissolving chlorine tablets

Chlorine tablets ensure continuous dissolution and lasting protection for your pool

6) Clean the pool filter regularly

a. it is also important to configure the pool filter to run 24 hours to remove all impurities from the pool, as the unit will often pick up leaves, twigs, algae and other elements that can clog it

b. For sand filters: sand wash and subsequent rinse.

#2 How to finish the procedure for cleaning green pools without emptying

Step 1) Chemical analysis of pool water

a. Evaluate, control and determine whether we should adjust the parameters of pioscine (described below).

b. Before starting the process of cleaning green pool water, chemical analysis testing is necessary as this can determine the level of pool water present in the pool water, which allows a more accurate understanding of the problem, as well as determining the most feasible solution.

c. To perform a chemical analysis of the water in a swimming pool, you only need to use an analysis kit, which determines the condition of the water by applying various chemicals that are used to indicate the level of some specific values​​​such as chlorine or pH. Happening.

Step 2) First calibrate the alkalinity value of the pool, then calibrate the pH value of the pool water.

Alkalinity is the ability of water to neutralize acids, measuring all alkaline substances (carbonates, bicarbonates, and hydroxides) dissolved in water, although borates, silicates, nitrates, and phosphates may also be present.

Alkalinity acts as a regulator of pH changes.

Parameters to review Alkalinity Water volume: The ideal range is 80-120mm.

Appropriate values for pool water pH: The ideal neutral pH range is between 7.2 and 7.6

If the alkalinity of the water is not correct, it can cause the sanitizer not to work either, because: it disturbs the pH, it forms limescale on the walls, etc.

Step 3) Recycle green pool water, check the hardness of the pool water

What is "Water hardness":

a. Means the concentration of minerals in the water, mainly magnesium and calcium, and therefore the aggregation of alkaline salts

b. Ideal pool water hardness value: 175 to 225 ppm.

c. The range of cell hardness values for coatings other than liners is 180 to 275 ppm.

How to improve:

Use a pool hardness enhancer

How to lower:

Use pool calcium hardness reducers

Step 4) Check water disinfection

Chlorine parameters Ideal parameters: 1 – 1,5ppm

If the water level is correct, we will activate the pool filtration for a day, combining this feature with continuous cleaning of the walls and bottom. If we find that the chlorine level is incorrect and low, a shock treatment is necessary

* Remark:

Whenever chemical products are added, filter for at least 12 hours as it can be irritating to swimmers

Step 5) Recycle green pool water, pay attention to the time of pool filtration

General formula for filter time

A very general formula for determining filtration time: water temperature / 2 = filtration hours

Most importantly, it is essential to start filtering the pool when the sun and heat are at their maximum.

Continuous filtration is necessary once the water temperature exceeds 28ºC.

Step 6) Clean Pool Filters Regularly

a. It is also important to configure the pool filter to keep it running 24 hours to remove all impurities from the pool as the unit will often absorb leaves, twigs, algae and other elements that can clog it

b. In the case of a sand filter: Carry out sand washing and subsequent rinsing.

Step 7) Clean pool walls and floors

We will describe this part in detail, please follow below - Pool Cleaning Robot

Step 8) Consider whether part of the pool water needs to be refreshed

If the previous steps did not bear fruit, then update a portion of the water volume (about 1/3 of the water), basically including this surface and bottom cleaning operation

#3 About Shock Therapy

1) When to perform shock therapy

a. Green Pool

b. Mud Rain

2) What is shock therapy

Purification and elimination of bacteria, algae or microorganisms in water based on the overuse of disinfectants through chemical products

3) How to perform shock therapy

1. Use shock chemicals: shock chlorine (min. 70% chlorine).

#4 Other green algae treatments if pool shock treatment doesn't work: Pool flocculation

1) What is a pool flocculant

Flocculants or coagulants bind the algae together so that the live algae are sucked away. It might take a hard day's work, but by the end your pool should be clean.


It's the fastest way to make your pool look good, but it doesn't make the water safe for swimming.

2) Treatment steps of pool flocculation

Step 1. Improve circulation to deal with microalgae stains.

1.1 If microalgae form but do not spread to the rest of the pool, there may be areas of standing water.

1.2 Check that your sprinkler is working properly.

1.3 They should point towards the water at an angle so that the water moves in a spiral.

Step 2. Collect algae with flocculant. 【Swimming pool flocculation steps】

2.1 If the water is green: Apply a flocculant tablet in the engine pre-filter.

2.2 Filter for 12-24 hours until the water is clear.

2.3 Vacuum again.

2.4 Clean the pool filter again (in the case of a sand filter, go back: carry out the sand washing and subsequent rinsing).

Step 3. Shock treatment restores pool value

3.1 If algae can reproduce, so can viruses and bacteria.

3.2 Subsequent chlorine shock treatment to disinfect the pool and do not swim in the pool until the chlorine and pH levels have returned to normal.

#5 How long does it take for the green water in the pool to disappear after the treatment?

The complete disappearance of the algae may last for several days, depending on the condition of the pool water.

Therefore, this process must be repeated several times until the water has the correct values for alkalinity, chlorine, and pH, and the appearance is adequate.

2. Most common shock treatment chemicals: Liquid shock chlorine or tablets, reactive oxygen, liquid oxygen.

3. Perform shock chlorination To the pool: Add 10 grams of specific shock chlorine product per cubic meter of water (you can find it in different forms: granules, tablets, liquids...).

4. We fill a bucket with water and m3 pool water according to the product instructions.

5. Stir the water in the bucket to dissolve the product.

6. Pour the contents of the bucket little by little into the pool return near the nozzle to allow it to mix.

7. keep the pool filtration running for at least one full filtration cycle (they are usually between 4-6 hours).

8. Once the time has passed, we will check the pH again as we may need to adjust it (ideal pH: 7,2-7,6).

4) How to Perform Liner Pool Shock Chlorination

1. It is important to dissolve the proper dose of antifreeze product. Use for swimming pools in containers before rolling them out to avoid damaging the lining.

2. The moment we pour the repaired solution on the surface of the pool water, we will insert and keep the pool filtered for at least one filtration cycle (they are usually around 4-6 hours)

#6 How long does it take on average to clean a green pool?

The quickest way is to use pool chemicals and pool filters. This process usually takes 4-5 days, but after 24 hours you will start to notice significant improvement.

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