How to maintain pool water chemistry in rain?

pool-after-rain

Rain might feel refreshing when you’re in the pool—but for your pool water chemistry, it can be a bit of a troublemaker. If you live in Dhaka, you already know how unpredictable the weather can be, especially during the monsoon season. While a little rain won’t hurt, frequent or heavy showers can disrupt your pool’s balance and lead to cloudy water, algae, or equipment strain.

Here’s a simple, friendly guide to help you maintain your pool water chemistry during and after rain.

💧 What Rain Does to Your Pool

Rainwater is usually acidic and unbalanced. When it enters your pool, it can:

  • Dilute chlorine and sanitizers

  • Lower the pH and alkalinity

  • Introduce debris, dirt, and algae spores

  • Lead to cloudy water or green pool conditions

That’s why a little prep and post-rain care go a long way.


🧪 1. Test Your Water After Rain

Right after the rain stops, use a pool test kit or test strips to check:

  • pH (ideal range: 7.2–7.6)

  • Chlorine levels (1–3 ppm)

  • Alkalinity (80–120 ppm)

Rain often drops the pH and alkalinity, so you may need to add balancing chemicals to restore stability.


🧼 2. Remove Debris Quickly

Leaves, twigs, and dirt often get blown in during a storm. Use a skimmer net to remove them ASAP. If left too long, they’ll break down and affect your chlorine levels and water clarity.


🔄 3. Run Your Pump & Filter Longer

After rain, run your pool pump and filter system for at least 8–12 hours. This helps:

  • Circulate chemicals properly

  • Filter out contaminants

  • Keep the water clean and balanced

You may also want to backwash the filter if there’s a lot of dirt buildup.


⚗️ 4. Shock the Pool (If Needed)

If the water looks cloudy or smells funny, consider adding a pool shock treatment. This boosts the chlorine level and kills bacteria or algae introduced by the rain.


🧴 5. Use Algaecide as a Preventive Measure

In areas like Dhaka, where rain is frequent, it’s smart to use algaecide once a week during the rainy season to prevent green pool nightmares.


🛡️ Bonus Tip: Use a Pool Cover

If heavy rain is expected, cover your pool beforehand. It keeps out debris, rainwater, and reduces the need for chemical rebalancing.


✅ Final Thoughts

Maintaining pool water chemistry during rain doesn’t have to be stressful. A little care and timely action will keep your pool sparkling and swim-ready, no matter what the Dhaka skies throw your way!

Need help after a heavy downpour? We offer professional pool maintenance and water testing services in Dhaka—just a call away!

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