How Much Sand To Use With Your Sand Filter System

How Much Sand To Use With Your Sand Filter System

Anthony Barnes

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In order to keep your pool clean and safe for swimming, it is important that you regularly filter the water in your pool.

Pool filters are designed to remove debris from the water so that you can enjoy a clean and healthy swimming environment. 

One type of filter for your pool is a sand filter. A sand filter works by allowing water to pass through while trapping any particles that shouldn’t be in the water.

This allows the smaller particles to be removed from the water. In addition, a sand filter will also help prevent algae growth if the water quality is not good enough.

You might be wondering how much sand you should add to your water filtration system.

The answer depends on several factors such as the type of water filtration system you have, the size of your tank, and the amount of time you want to spend filtering your water.

It is important to put the right amount of sand into your sand filter as having too much or too little sand can cause problems such as the filter system not working efficiently.

So to help you, we are going to walk you through how to figure out how much sand to use with your sand filter system. 

What Is A Sand Filter System? 

Before we look at how much sand to include in your sand filter system, it is important we understand what exactly a sand filter system is and how it works.

This can help you to work out how much sand to include in your sand filter system. 

A sand filter (see also ‘Sand Filters Vs Cartridge Filters‘) system consists of three main components: a sand bed, a pump, and a skimmer.

These three parts work together to allow water to flow through the sand bed where the sand traps unwanted particles.

Once these unwanted particles have been trapped, they have then moved away from the rest of the pool. 

How Much Sand To Put In A Sand Filter

In order to make sure you get the most out of your sand filter system, you need to know how much sand you should put in.

When it comes to deciding how much sand to put in your sand filter, it largely depends on the brand and manufacturer’s specifications of your sand filter. 

However, if you are unable to find this information there is some general advice you should follow. 

Two-Thirds Rule

The first thing to consider is the two-thirds rule. A lot of sand filter systems are designed so that you fill them with sand until it is filled two-thirds of the way. 

So whenever you are in doubt about how much sand to put in your sand filter (see also ‘How To Connect Hoses To Your Sand Filter‘), you can try this advice.

Filling sand two-thirds of the way allows for enough room above the sand bed. 

Size Of Sand Filter System

Size Of Sand Filter System

If you know the size of your sand filter system then you can determine how much sand you need to put in your sand filter.

To help you work out how much sand to put in your sand filter system, we have created a small chart with the amount of sand you should put in based on the size of your tank. 

Size of Tank (Diameter)Amount of Sand (Pounds)
16 Inches 100 lbs
18 Inches150 lbs
20 Inches200 lbs
22 Inches250 lbs
24 Inches300 lbs

Filter System 

However, if you want something that is more specific than there are guidelines based on the brand of filter system you have.

We have created a small table outlining the sand requirements for certain filter system requirements. 

Filter System (Brand)Amount of Sand (Pounds)
Hayward S166 T 16 Inch100 lbs
Hayward S210 T 20 Inch200 lbs
AquaPro 19 Inch150 lbs
AquaPro 24 Inch300 lbs
Pentair SD40 150 lbs
Hydrotools 16 Inch 100 lbs
Hydrotools  24 Inch300 lbs

Pool Sand Filter Calculator 

If you are still unsure about how much sand you can put in your filter system then it might be a good idea to use a pool sand filter calculator.

These will help to determine the amount of sand you need. All you need to know is the diameter of your sand filter tank. 

What If There Is Too Much Sand In The Sand Filter System?

If you have put too much sand in your sand filter system then it could lead to problems. For example, if you have put too much in your sand filter system then you may end up with an overflow.

An overflow occurs when the sand has become packed down and cannot allow any more water to pass. As a result, the excess water flows over the top of the sand. 

It could also lead to parts of your filter system breaking. 

What If There Is Too Little Sand In The Filter System? 

If you have not included enough sand in your sand filter then you will not be able to remove all the dirt and debris from your pool.

It will mean that the water will contain a high level of dirt and debris which could cause issues in your pool.

Essentially, you would be wasting your sand filter system as it would not be working effectively.

This means you may have to spend more time maintaining the cleanliness of the pool yourself. 

Final Thoughts

Sand filters are very important to maintain the quality of your pool water. They are used to keep the water free from contaminants such as algae and bacteria.

If you do not use a sand filter then these contaminants will build up in your pool causing problems.

It is important that the proper amount of sand goes into your sand filter system to make sure it is working efficiently.

We hope this guide has cleared up any confusion about how much sand to put in your sand filter system. 

Please share this guide with anyone who needs clarification about how much sand to add to their sand filter system. Thank you for reading! 

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By Anthony Barnes

Anthony Barnes is the founder of Water Heater Hub and a second-generation plumber by profession. Before developing Water Heater Hub, Anthony Barnes was a full-time plumber, and he has undertaken a wide variety of projects over the decades. As a second-generation plumber, it was easy for Anthony to get used to the technicalities of all from a tender age