how to determine pool filter size

Author: PoolKing - Pool Sand Filter Manufacturers

How to Determine Pool Filter Size

Having a pool at home comes with a lot of responsibilities; you need to maintain it, clean it regularly, and make sure that the water is always clean and clear for everyone's safety. This is why having a pool filter is essential. It helps remove impurities and debris from the water, keeping it safe and sanitary for all swimmers. However, choosing the right pool filter size can be daunting. In this article, we will guide you and give you tips on how to determine pool filter size.

Why Do You Need a Pool Filter?

Before we dive into determining the filter size, allow us to first emphasize why you need a pool filter. A pool filter helps keep your pool water clean and clear. It removes dirt, debris, leaves, and other impurities that may accumulate in your pool. These impurities can cause bacteria growth and algae build-up, making your pool not only look unappealing but also unsafe for swimming.

A pool filter comes in different sizes, and choosing the right one will depend on several factors such as pool size, water usage, and frequency of cleaning.

Determining the Right Pool Filter Size

Selecting the correct pool filter size can save you time, money, and a lot of headaches in the long run. Here's how you can determine the right pool filter size for your swimming pool.

1. Measure Your Pool

The first thing you need to do is measure your pool. Measure the length, width, and depth of your pool. You can use a measuring tape or a distance wheel to take the measurements. Once you have the measurements, multiply the length, width, and depth to get the total volume of your pool in cubic feet.

For example, if your pool measures 20 feet in length, 10 feet in width, and 5 feet in depth, the total volume of your pool would be:

20 x 10 x 5 = 1,000 cubic feet

2. Calculate the Turnover Rate

The turnover rate is the amount of time it takes for the water in your pool to pass through the filter. Generally, you should aim for a turnover rate of 6 to 8 hours. To calculate your pool's turnover rate, divide the volume of your pool by the flow rate of your pump.

For instance, if your pump's flow rate is 50 gallons per minute, you can calculate your turnover rate as follows:

(1,000 cubic feet / 7.5) x 60 = 8,000 gallons per hour

3. Select the Filter Type

The next step is to select the type of filter you want for your pool. There are three types of pool filters: sand, cartridge, and DE (diatomaceous earth).

Each of these filters has its pros and cons, and your selection should depend on your budget and maintenance preference.

4. Determine Filter Size

After selecting the type of filter you want, you need to determine the right size based on your pool's volume and turnover rate. Below is a rough guide to the recommended filter size for different pools and turnover rates:

- 100 sq ft filter for pools up to 20,000 gallons with turnover rates of 6 hours

- 200 sq ft filter for pools up to 40,000 gallons with turnover rates of 6 hours

- 300 sq ft filter for pools up to 60,000 gallons with turnover rates of 6 hours

- 400 sq ft filter for pools up to 80,000 gallons with turnover rates of 6 hours

- 500 sq ft filter for pools up to 100,000 gallons with turnover rates of 6 hours

Conclusion

Choosing the right pool filter size is crucial to maintaining a clean and safe swimming environment. By following the steps above and taking into account your pool size, flow rate, and turnover rate, you should be able to find the right size filter to keep your pool crystal clear all year round. Just remember to keep up with regular maintenance and cleaning to get the most out of your investment, and enjoy a refreshing dip in the cool waters of your pool.