A green pool is usually caused by algae growth. Even if you’re adding chlorine, green water is a sign your pool chemistry or circulation isn’t balanced. The good news? With the right steps, you can get your pool crystal clear again.

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Step 1: Test Your Water

Before adding anything, test your pool water for:

• pH (You should be aiming for a pH of 7.2-7.6)
  
• Free chlorine (If your free chlorine reads below 2ppm then a shock treatment is  required)
• Stabiliser/Cyanuric acid (Aim for 30-60ppm)

Knowing the exact numbers will help you treat your pool efficiently and prevent overcorrecting.

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Step 2: Adjust pH

If you pH is out of that healthy 7.2-7.6 range adjust accordingly using pH increase,pH decrease, or hydrochloric acid.

Correcting pH ensures chlorine works properly.

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Step 3: Shock the Pool

Once water balance is set, it’s time to shock your pool:

Use 1.2L of liquid chlorine per 10,000L to break down algae and restore free chlorine levels.
Alternatively Dichlor can be used at the rate of 200 grams per 10,000L. 

Tip: Brush walls, steps, and corners to dislodge algae spores.

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Step 4: Run the Pump and Filter Continuously

Algae removal requires circulation:

• Run your pump 24 hours a day until the water clears.
• Clean or backwash the filter if pressure rises, so debris doesn't recirculate.

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Step 5: Monitor and Maintain

After the water clears:

• Maintain free chlorine at 1-3ppm
• Test water weekly for pH, Alkalinity, and chlorine.
• Brush and skim the pool regularly.

Balanced water and consistent maintenance prevent algae from coming back.

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Quick Tips

• Avoid swimming until water is clear.
• Don’t over-add chemicals — always follow product dosing instructions.
• Check stabiliser levels; too much can make chlorine less effective.

With the right order — test, balance, shock, circulate — even a green pool can return to sparkling clarity in a day or two.