How Many Chlorine Tablets for Intex Pool

By Greg Jarvis | Last Updated: September 8, 2022

A great way to keep your pool’s chlorine levels steady all season long is to use chlorine tablets. A floating dispenser or automatic chlorinator can slowly release chlorine while still maintaining a sterile and clear water supply.

A good starting point would be to calculate the weekly dosage required for your pool’s water capacity and then multiply that dosage by seven days. You’ll need one chlorine tablet per 5,000 gallons of pool water. It’s also a good idea to round down to the nearest 5,000 gallons whenever possible.

For example, if your swimming pool only holds 8,000 gallons of water, you should use the chlorine recommended for a 10,000 gallons pool when adding it. When rounding up, you will always get the correct amount of chlorine.

Adding Chlorine Tablets: How Often Is Enough?

Adding chlorine tablets once a week is generally sufficient. To keep your pool in good working order, you should choose a day of the week when you can perform weekly maintenance and refill chlorine tablets on an established basis. As a result, maintaining your pool will be a breeze.

Add four tablets weekly to a 16,000-gallon swimming pool. You should clean your skimmer and pump skimmer basket when you add the tablets each week. Clean your filters and backwash your pool if necessary. Then perform all of your pool maintenance tasks at once, including testing the water in your pool.

Here’s a hint: When the time comes to replenish your supply of chlorine tablets on a weekly basis, keep an eye on the remaining chlorine level. You can count the tablet if the total number of tablets equals one tablet.

In this case, if you add four tablets each week, you can only put three in each week to bring the total back up to four, which will extend the season of chlorine. During the fall and winter months, this may happen when the water temperature is lower. As the water temperature rises, so does the rate at which chlorine dissolves.

The Best Place to Put the Chlorine Tablets

Chlorine tablets should not be placed directly in the skimmer, as this could cause problems. Here is the best way to dispense the chlorine tablets.

Chlorine Floater Dispenser

You can use this method to distribute chlorine through your pool all season long gradually. Place the pucks in the floater and let them float on the water’s surface. Most models allow you to alter the amount of chlorine entering the system by adjusting the opening.

Automated Chlorine Generator

An automatic chlorinator is a more sophisticated but more expensive option. Installing it in your pool’s plumbing will necessitate some work. Choosing an automatic chlorinator is a choice that comes with a variety of options.

Inline Chlorinator

After the pool pump and filter, the permanent pipe or hose that leads to the jet return and returns water to the pool will be installed with an inline chlorinator for your convenience. To connect your chlorinator, you’ll need to size your pipelines properly. This is your best bet if you haven’t finished installing the plumbing for your pool pump and filter.

Offline Chlorinator

What if you’ve already installed your pool’s plumbing and are now considering installing a chlorinator? The best option for you will be an offline chlorinator. An offline chlorinator can be easily installed by connecting the automatic chlorinator’s lines to the pipe that returns water to your pool. A small hole can be drilled in your PVC pipes, and then the line can be added. To ensure a perfect fit, refer to the installation instructions in your manual for the precise drill bit size.

How Many Chlorine Tables for Intex Pool

The answer is it depends on the size of your pool and the size of chlorine tablets. The tablets are available in one-inch tablets and 3-inch tablets.

Refer to the following chlorine tablet dosage guideline to achieve the best results. The tablet used here is a 3-inch tablet.

Pool SizeNumber of Chlorine Tablets
2,500 – 5,000 gallon pools  1 chlorine tab per week
7,000-gallon pool  1-2 chlorine tablets per week  
10,000-gallon pool  2 chlorine tablets per week  
13,500-gallon pool  2-3 chlorine tablets per week  
15,000 – 17,000 gallon pools  3 chlorine tablets per week  
20,000-gallon pool  3-4 chlorine tablets per week  
25,000-gallon pool  4-5 tablets per week  
30,000-gallon pool  5-6 tablets per week  

Keep in mind that one 3-inch tablet can sanitize 5000 gallons of water. So, for a 20,000 gallon, you need four tablets.

To figure out how many chlorine tablets you’ll need, start by rounding off your pool’s volume (in gallons) to the nearest 5,000th. A 14,000-gallon pool would have an approximate volume of 15,000 gallons.

Read more about the best intex pool vacuum guide.

Frequently Asked Questions – (FAQ)

How many gallons does a 1-inch chlorine tablet treat?

When using chlorine tablets, the calculation is simple. Because one three-inch tablet can treat 5,000 gallons of water, we typically recommend them. It takes 12 one-inch chlorine tablets to treat 5,000 gallons of water.

Can you break 3-inch chlorine tablets in half?

Yes, you can break a 3-inch chlorine tablet in half, but you need to be very careful. Ensure that the small pieces will not fall out as they can stain the plaster and vinyl pools. Using a screwdriver, score the tablet, and then with your hands, break it in half underwater in the skimmer basket.

Can you use 1-inch chlorine tablets for pools?

For smaller pools and indoor spas, one-inch chlorine tablets are recommended. But for bigger pools, 3-inch chlorine tablets are used. A one-inch chlorine tablet melts fast before it can be distributed throughout the pool. So it is best to use 3-inch chlorine tablets for bigger pools to last longer.


Chlorine tablets are the most common sanitizer to keep swimming pools clean. If you need to add more chlorine tablets to keep your water supply properly chlorinated, pick a day of the week to do so. Keep in mind the above tips on calculating the number of tablets you need for your pool. Keep an eye on the filters, water, and skimmers during this time to ensure that they are clean and clear. If necessary, you can replenish your pool’s water level by allowing evaporation to occur during this period. You can share your ideas and thoughts about the topic by commenting below.

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