What Causes Pool Algae?

Algae are tiny plant-like organisms that multiply in water. The main causes of algae growth in pools include:

• Poor water circulation—Stagnant water creates a breeding ground for algae
• Unbalanced pool chemicals—low chlorine levels let algae thrive
• Hot and humid weather—Dubai’s climate speeds up algae growth
• Debris in the pool—Leaves, dirt, and sunscreen can introduce algae spores

Types of Pool Algae

Before you tackle the problem, it helps to know what you’re dealing with:

• ‍Green Algae—The most common type, turns your water cloudy and green.‍
• Yellow/Mustard Algae—Sticks to pool walls and is chlorine-resistant.‍
• Black Algae—The toughest to remove, it grows deep into pool surfaces.

Each type requires a slightly different approach, but all algae need to be eliminated fast before they spread.

Step-by-Step Guide to Removing Algae

1. Test and Balance Your Pool Water

Use a pool test kit to check chlorine levels which should be between 1 to 3 ppm, pH levels which should ideally range between 7.2 - 7.6, and alkalinity which should be between 80-120 ppm.

2. Brush the Algae Off Your Pool Walls

Grab a pool brush and scrub pool walls, floor, steps and corners. This loosens the algae so your chemicals and filter can remove them.

3. Shock Your Pool with Chlorine

Adding shock treatment (super-chlorination) kills off algae fast: Use three to five times the normal chlorine dose for green algae; Use four to six times for yellow algae, and use six to eight times for black algae. Run the pool pump for at least 24 hours to circulate the chlorine.

4. Run Your Pool Filter 24/7

Your filter is your best friend when battling algae. Keep it running nonstop for at least 24-48 hours to clear out the dead algae.

• ‍Sand filters—backwash every few hours.‍
• Cartridge filters—Remove and clean manually.‍
• DE filters—backwash and add fresh DE powder.

5. Vacuum and Remove Dead Algae

After shocking your pool, vacuum out the debris from the bottom. If you leave it, algae can regrow. Use a manual vacuum instead of an automatic cleaner (so you don’t stir up algae). If there’s a lot of debris, drain some water and refill.

Preventing Algae Growth in the Future

Now that your pool is algae-free, keep it that way with these easy prevention tips:

1) Maintain chlorine levels—test your water twice a week.
2) Run your pump daily—at least 8-12 hours per day.
3) Shock your pool weekly—especially in Dubai’s hot summer months.
4) Brush and vacuum regularly—don’t let algae get comfortable!
5) Use an algaecide—adds an extra layer of protection.

Final Thoughts

Algae might be annoying, but with proper pool care, you’ll never have to deal with it again. Stay consistent with cleaning, chemicals, cleaning, chemicals, and circulation, and your pool will stay clean, blue, and inviting all year round!

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