🏖️ Why should I change the sand in my pool filter – and when should I do it?

Why change the sand in your pool filter? Find out when to do it, the signs of wear, and how to improve your pool's filtration.

🏖️ Pourquoi changer le sable dans mon filtre de piscine – et quand le faire ?

The sand in your pool filter is essential for maintaining clear, clean, and well-filtered water . But over time, even the most effective sand loses its filtering power.

⏳ So, why and when should you change it? Here's everything you need to know.

🧪 What is the role of sand in a pool filter?

The sand acts as a filter medium that retains impurities present in the water:

-Dust

-Plant debris

-Sun oils

-Microorganisms

Water passes through the sand, which captures particles, then returns cleanly to the pool. But over time, the sand grains wear down, become smooth, and filtration becomes less effective.

❓ Why do you need to change the sand?

Here are the main reasons:

1. Loss of efficiency

-Sand clogs with oils, algae and chemical residues .

-The grains become smooth and no longer filter as well → the water becomes cloudy.

2. Slow filtration or high pressure

-The filter pressure gauge constantly displays too high a pressure .

-You have to do backwashes more and more often.

3. Debris returning to the pool

-If you notice dirt coming back through the jets, the sand is probably saturated or clumped.

4. Risk of channel formation in the filter

-Water creates direct paths in the compacted sand , which significantly reduces the filter's efficiency .

📅 When should the filter sand be changed?

In general, it is recommended to change the sand every 3 to 5 years , depending on:

Type of sand Recommended frequency
Standard sand Every 3 to 5 years
Filter glass Every 7 to 10 years
Zeolite Every 5 to 7 years

💡 Exception: If you have had recurring algae problems, greasy deposits or very hard water, change the sand sooner.

🛠️ How to change the sand? (quick overview)

  1. Turn off the pump and close the valves.

  2. Open the filter cover.

  3. Remove the sand using a spoon or wet/dry vacuum cleaner.

  4. Clean the tank and check the strainers at the bottom.

  5. Fill halfway with water to protect the strainers.

  6. Add new sand (quantity according to model).

  7. Do a backwash before putting it back into filtration mode.

📍 Or entrust this task to a certified Geyser Pools technician for fast and guaranteed service!

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