What is Pool Closing and How Does It Work?

As the summer season comes to an end, it's time to start thinking about pool closing. But what exactly is pool closing and how does it work? In this blog post, we will explore the process of pool closing and why it is important for the health and longevity of your pool.

Why is pool closing necessary?

Pool closing is an essential step in pool maintenance that prepares your pool for the winter months. During this time, the pool is not in use, and the water needs to be properly treated and protected to prevent damage and ensure a smooth opening in the spring.

What are the steps involved in pool closing?

Pool closing involves several important steps to ensure the pool is properly winterized. Here are the key steps:

1. Balance the water chemistry

Before closing the pool, it is crucial to balance the water chemistry. This includes adjusting the pH, alkalinity, and calcium hardness levels to their recommended ranges. Properly balanced water helps prevent corrosion, scaling, and algae growth during the winter months.

2. Clean the pool

Thoroughly clean the pool by removing any debris, leaves, and dirt. This helps prevent staining and algae growth. It is also recommended to brush the pool walls and floor to remove any algae or mineral deposits.

3. Lower the water level

Lowering the water level in the pool is necessary to protect the skimmer and plumbing lines from freezing and potential damage. The water level should be lowered below the skimmer mouth but not below the return jets.

4. Drain and winterize the plumbing lines

Drain the water from the plumbing lines, including the pump, filter, and heater. This prevents any remaining water from freezing and causing damage. It is important to follow the manufacturer's instructions for winterizing these components.

5. Add winterizing chemicals

Adding winterizing chemicals is crucial to prevent algae growth and maintain water clarity during the winter months. These chemicals include algaecides and winterizing kits that contain a combination of chemicals to inhibit the growth of bacteria and algae.

6. Install a pool cover

The final step in pool closing is to install a pool cover. A properly fitted cover helps keep debris out of the pool and provides an additional layer of protection. There are different types of covers available, including mesh and solid covers, each with its own benefits.


Pool closing is an important process that prepares your pool for the winter months. By following the necessary steps, you can protect your pool from damage and ensure a smooth opening in the spring. Remember to consult a pool professional or refer to your pool manufacturer's guidelines for specific instructions on pool closing.

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