How many chlorine tablets per week should I add to my pool?

Chlorine/Chlorine tablets are important for killing bacteria and algae in the water, but too much can be bad for your skin and eyes. It is commonly used all around the country, so you probably have it at home already.

The amount you use depends on how often you want to test the water, how deep the pool is, and how long you expect the pool to stay open. It is also based on the size of the pool,  the shape of the pool, and the type of filter you are using.

Check out our post on ‘Why do Swimming pools have chlorine?‘.

What are chlorine tablets?

Chlorine tablets contain a combination of chemicals that kill bacteria and algae. You can buy them from most pool supply stores. If you don’t know what kind of pool filter you are using, ask your store owner or call the manufacturer. If you are adding the tablets every time you test the water, you will need about one tablet per gallon (3.8 liters) of water. If you only test the water once a month, you will need two tablets per gallon.

You may see instructions on the bottle telling you how many tablets to use for different amounts of water. One tablet per gallon is usually recommended for pools with less than 10,000 gallons (38,000 liters). Two tablets per gallon are generally recommended for pools with more than 10,000 gallons.

How many Chlorine tablets per week do you need?

To get an idea of how many tablets you would need per week, divide the number of gallons by the number of days you expect to keep the pool open. For example, if you plan to leave the pool open 5 days a week, you could use 3 tablets per day, which equals 1 tablet per 8 gallons (30 liters) each day. If you are planning on leaving the pool open 7 days a week, you would need 2 tablets per day, which totals 4 tablets per 8 gallons (30 liters).

When you first start testing the water, you might not notice any difference between the pool with no tablets and the pool with one tablet added to the water. But after a few weeks, you’ll notice that the pool without tablets has a cloudy appearance, while the pool with one tablet looks clear. This is because the chlorine level in the pool without tablets is lower. As you continue to add tablets, the pool will gradually become clearer. Eventually, you won’t need to add any additional tablets. The reason why this happens is that the chlorine levels in the pool are high enough to kill off any bacteria and algae.

How to add chlorine tablets to your pool?

Adding chlorine tablets to your pool is easy. Just follow these steps:

1. Open the bottle of tablets.

2. Pour the tablets into the water.

And you’re done!

Where to buy chlorine tablets?

Most pool supply stores carry chlorine tablets. Look for bottles labeled “chlorine” or “pool chlorination”. They typically come in small bottles that hold several hundred tablets. You can find chlorine tablets at most grocery stores as well. Most brands include the same ingredients as pool tablets. Some of these are:

Calcium hypochlorite – Calcium chloride + sodium hydroxide calcium hypochlorite

Dichromate – Sodium dichromate + sodium bicarbonate potassium dichromate

Sodium dichromate is the active ingredient in pool tablets. When used properly, it kills bacteria and algae.

Potassium dichromate is the inactive ingredient in pool tablets. Potassium dichromate does not hurt people but it can be toxic to fish and other aquatic animals.

Sodium bicarbonate is the inert ingredient in pool tablets. It neutralizes the chlorine produced when the other ingredients react together.

Are there any health risks associated with chlorine tablets?

Yes, there are some health risks associated with chlorine. These include eye irritation, skin rash, and breathing problems. However, they are very rare. People who have allergies to latex rubber products should avoid using chlorine tablets. If you are concerned about your child’s safety, talk to your doctor before giving them pool tablets.


Chlorine tablets work best when mixed with tap water. Adding too much chlorine can cause damage to your pool equipment. Keep in mind that adding too little chlorine also causes problems. They are easy to find online or at most pool supply stores. 

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