The 5 Best Auto Chlorinators for Pool – [Reviews & Rankings]

Automatic pool chlorinators are the best way to maintain your pool’s chlorine levels. This important tool comes in handy for those who are tired of constantly putting pucks of chlorine in a floater.

Such chlorinators are a perfect replacement if you want to avoid handling chlorine tablets frequently. Also called pool chemical dispensers, these devices use chlorine and bromine sticks’ tablets to sanitize your pool water.

They work by automatically dispensing chlorine or bromine sticks slowly into the pool. This ensures that your pool water remains free of bacteria.

Nonetheless, when searching for one, consider an item that lets you configure the dispensing rate. It also should be portable and affordable for your budget.

How Does an Automatic Pool Chlorinator Work?

Swimming pools collect harmful bacteria, algae, and viruses, so they need to be cleaned regularly. An automatic pool chlorinator is one option you can use to clean your pool.

These devices are attached to your pool filtration system and filled with either chlorine tablets or sticks. The chlorinator then works automatically to release a specified amount of chlorine into the water.

The device is made up of a body that holds either one or three-inch tablets. The system also has a control valve that controls the water flow and determines the chlorine feed rate.

The only thing you need to do manually is to add chlorine tablets. You can use a pool chlorinator to release either chlorine or bromine to sanitize your pool. You adjust the amount of chemical to be injected into the pool based on the size of your pool.

To help you make a decision, we have outlined some of the best auto chlorinators that can work best for your pool.

Comparing the Top Auto Chlorinators

1. The Pentair Automatic Rainbow 320 Chlorine Feeder – Best Overall

The Pentair Automatic Rainbow 320 Chlorine Feeder is the best reliable auto chlorine dispenser that can be used comfortably on the pool or spa. The feeder is easy to install and works great. It holds up to 11 large or 98 small tablets of bromine, which automatically dissolve at a slow rate.

This dispenser can treat between 6500 to 27000 gallons of water effectively. It comes with an enclosed system that eliminates the normal venting worries. It uses ¼ inches of feeder hoses, with control valves and fittings.

Being an inline auto chlorine feeder, it is great and easy to install in the return line of your home’s pool or spa system. Besides, the dispenser is built with flow through the circulation system that results in full clean water output.

The Pentair Automatic Rainbow 320 Chlorine Feeder is reliable and highly efficient in providing automatic sanitization. Through its slow-release mechanism, maintenance is easy and less frequent. This feeder is also available in off-line models that add to its convenience.

2. The Hayward CL200 Pool Chemical Feeder – Most Reliable Auto Chlorinator

The Hayward CL200 Pool Chemical Feeder is an effective dispenser. It makes maximum use of both small and large chlorine and bromine tablets. It features dial control valves that allow for an easy feeding rate adjustment.

The easy-lock threaded cover provides safe and convenient access to add some tablets if your device is running low. Besides, its unique finger-release catch provides much convenience besides adding to the security of the device.

The Hayward CL200 Pool Chemical Feeder can sanitize pools from 5000 to 40000 gallons. Its durable ABS body made from high-quality Viton seal ascertains extended life besides being corrosion-free.

Those who have tried using this model liked the removable mounting base. This makes it perfect for those who plan on having the device off the ground as they won’t have to be worried about the mounting base floating.

3. The Hydro Automatic Super Premium Inline Chlorine Dispenser – Most Premium Auto Chlorinator

Weighing only 3lbs, the Hydro Automatic Super Premium Inline Chlorine Dispenser is a premium choice of chlorinator for both in-ground and above ground pools. It can take both chlorine sticks and one to three-inch tablets.

Aside from being premium and lightweight, this automatic chlorine dispenser is easy to install. It is fully adjustable. Therefore, depending on the size of your pool, you can adjust the amount of chlorine and the tablets dissolving rate.

This unit is made from heavy-duty resin that provides assurance of corrosion resistance and durability. You might consider changing the O-ring on the lid for a tighter seal, to eliminate the common leaking problem.

4. The Aquatix Automatic Pro Chlorine Dispenser – Best for the Money

The Aquatix Automatic Pro Chlorine Dispenser is the best chlorine dispenser of choice for those looking for a cost-effective way to clean their pools.

It also allows you to eliminate algae and bacterial growth in their pools or generally looking for an easy and quick solution to clean the pool. This premium chlorine dispenser makes pool maintenance a breeze. It is as simple as inserting the tablet, locking the cap and enjoy clean and safe swimming water. Of course, vacuuming you pools from time to time using either the top battery-powered pool vacuums or top above ground pool vacuums.

Perhaps the feature highlight of this feeder is the childproof feature. This eliminates most dangers posed by chlorine dispensers. With this model, the locking cap provides an assurance of a safe and fun environment for all.

The Aquatix Automatic Pro Chlorine Dispenser features an adjustable dial valve that provides complete control and flexibility. It is also built to last and won’t break easily. Besides, storing and cleaning the dispenser is easy, thanks to its compact shape.

5. The Inline Hydro 87502 Chlorine Dispenser – Highly Adjustable Dispenser

The Inline Hydro 87502 Chlorine Dispenser is an effective aboveground chlorine dispenser that comes with all you need for practical chlorination of your pool water. The device comes with a control knob that lets the user’s to adjust the filtration settings easily.

The dispenser should be placed above the water level for maximum effectiveness. Some of the noteworthy features of the chlorinator include:

• 9lbs capacity allows users to chlorinate a large pool or spa
• Easily adjustable knob that allows for easy adjustment of filtration preference
• Slow release mechanism helps maintain the chlorine levels consistently

How Long Should a Pool Chlorinator Last?

A pool chlorinator is built to last, but it won’t work indefinitely. Typically, they are designed to be used for 10,000 hours of operation.

Depending on if you use your pool all year round, this could mean anything from 3-7 years.  It can be expensive to replace a pool chlorinator. The cell and the control board, both cost up to $1000 or more.

You can extend the lifespan of your chlorinator by only cleaning the cell when necessary. It’s also vital to maintain constant salt levels and using the reverse polarity function. The reverse polarity function will help to reduce scale build-up of the cell.

Things to Consider When Buying Auto Chlorinators for Pool

Chlorine tablets are undoubtedly the easiest and safest way to chlorinate your pool. On the other hand, automatic chlorinators are chlorine tablet’s perfect partner.

This is because they maintain a consistent and constant chlorine level in your pool. Consider the following factors before buying.

Size of the Pool

This should be the first factor to consider before heading out to shop for these devices. You should be aware of the number of gallons that your pool can hold.

This will guide in determining the size of the chlorinator required. A small chlorinator may not maintain the required amount of chlorine in your pool.

Similarly, a large chlorinator may lead to excess chlorine levels in your pool. Therefore, find a perfectly sized chlorinator to maintain adequate levels of chlorine in your pool.

Pool Type

This is probably one of the most important considerations you need to make. You should choose the type of auto chlorinator based on the type of your pool.

While some models are more suitable for aboveground or inground pools, others will work better for spas and hot tubs. Your best bet is to choose a model that works great for any type of pool.

Chlorinator Brand

There are numerous brands of automatic chlorinators available on the market currently. Some of the common and popular brands include

Hayward

This is probably a well-known and ubiquitous chlorine feeder on the market currently. Hayward automatic chlorinators can work with both above and in-ground pools, either in-line or off-line versions.

These chlorinators feature a standpipe that draws in chlorinated water that can be cleaned in case of clogging resulting from residue collection. They have a capacity of 9lbs for in-ground models, which is large compared to other residential feeders.

Pentair

Like their counterparts, the Pentair Rainbow chlorine feeders are available in a myriad of sizes. They can hold up to 5lbs of chlorine tablets. These models offer a simpler lid assembly compared to their counterparts, with few O-lid problems. The small lid is also easy to open and doesn’t require a special wrench. Pentair line of products are often perfect for heavy-duty uses with their base plate thicker than other feeders.

CMP

Lengthily known as Custom Molded Products, they are the new kid on this block with the immense surge in popularity. Its automatic chlorinators bring a lot of interesting features on the market.

Perhaps the most noticeable feature is the see-through lid that makes it easy to check the tablet levels or read the side-mounted flow meter. It also features double unions that allow the in-feeder to be easily disconnected for storage, service or cleaning.

Sani-King

The Sani-King chlorinator technology has been in practice since the 70s. This feeder offers patented inline dispersal valve that only wets the bottom chlorine or bromine tablets to a few inches high. This is a better chlorination method compared to flooding the entire tablet chamber.

In-Line or Off-Line Chlorinator?

There are two main types of chlorinators. Automatic chlorinators can either be in-line or off-line. In-Line chlorine dispensers are static, plumbed in the return pipe. The chlorine feeder is fixed in a section of the clear pipe, near the ground level to prevent the chlorine gas from backing up into the filter valve.

On the other hand, off-line chlorine feeders are used when the pool has no room to install an in-line chlorinator. In such cases, 2 holes are drilled to the PVC pipe that supplies water to the pool. One is drilled before the filter and the other after the filter.

Of the two, an in-line dispenser is the best option. This is because its installation results in a sturdy and effective release compared to the off-line type. Nonetheless, if you have to install an off-line feeder, ensure that the base is installed to heavy blocks of wood or concrete to keep it steady when you open the lid to refill.

Installation

You will unquestionably want to have a unit that is easy to install. This is why you will need to set aside some time to read over feedbacks and comments before buying a chlorinator for your pool. Keep in mind that the installation will depend on the accessories and design.

Take into account the space for installation. The automatic chlorine dispensers come in different sizes and shapes, so you will need to pick a model that fits in the installation space.

Some models require additional accessories or plumbing to work. That’s why you should know whether you need an offline or inline chlorinator. Either way, go for a model that matches your pool type.

Extra Features

When selecting an auto chlorinator, it is of immense importance that you also check the extra features provided by the chlorinator. Some chlorinators have additional features such as unions that others may require that you purchase separately.

You should also pay attention to the size of your plumbing. This will help you avoid resizing your plumbing or purchase additional fittings as you fit the chlorinator. Make sure that your chosen chlorinator parts for the chlorination system are readily available.

Reverse Polarity

While one side of the cell is being cleaned, the other side produces chlorine. Thereafter, the other side will be producing chlorine while the opposite side gets cleaned. This is something known as reverse polarity.

But this doesn’t mean you do not have to clean the cell of your auto chlorinator. However, you will need to clean it from time to time as needed. So be sure to reverse consider polarity before making up your mind.

FAQ’s About Auto Chlorinators

Q: Why Use Auto Chlorinators for Pool?

A: Automatic chlorine dispensers came as a substitute to the initial chlorine pucks. Since its inception, there have been diverse use, owing to the effectiveness provided by these devices. Whereas both methods are good chlorine distribution methods, there is much to benefit from automatic dispensers compared to chlorine pucks.

Some of the benefits of automatic chlorinator compared to chlorine pucks include the following;

• Chlorine feeder automatically dispensers chlorine into your pool. This eliminates the worry of having to do it.
• These chlorinators pump chlorine directly into the pool instead of running the chemical through the filter first. This saves the filter from chlorine corrosion.
• With chlorinators, you can add large amounts of chlorine at once, controlling the flow with the accompanying dial.

Q: Do Pool Chlorinators Really Work?

A: Without proper chemical maintenance, swimming pools tend to get clogged with bacteria. Not only does it make your pool look disgusting, but it also puts you at risk for infection and disease. This is where pool chlorinators come in.

These automated devices ensure that there is the right amount of chemicals in your pool. This way they keep your pool healthy and clean. As a matter of fact, chlorine is a chemical that plays an important role in sanitizing the pool water.

So auto chlorinators really do their work without a doubt. They can do a great job of killing bacteria and keeping your cool clean by dispensing the necessary chemicals automatically.

Q: Do Auto Chlorinators for Pool Have Any Disadvantages?

A: The auto chlorinators for the pool need electricity to work just like any other electrical device. For this reason, you will need to find an energy-efficient chlorinator to save money on your bills.

But this is not the only problem associated with auto chlorinators. As a corrosive agent, salt leads to wear and tear over time due to the presence of the different pool parts. While not immediate, the effects of using salt will become visible as time goes on.

Ready To Buy The Best Auto Chlorinators for Pool?

Chlorine pucks are quite affordable as there is no need of spending money purchasing a chlorinator feeder. You can also easily tell when the chlorine levels in your pool are running low. Thirdly, you can control the amount of chlorine entering your water.

Chlorination filtration systems are associated with several drawbacks. For instance, they are quite costly to purchase and install. It also requires regular up keeping and maintenance, especially the O-ring.

From this, it is evident that using an automatic chlorinator dispenser should be your best way of adding chlorine to your pool or spa. To ascertain the utmost efficiency, it is important that you choose the best auto chlorinator.

Do you know you can drain your pool using a garden hose? We have written a guide here to help you out. And, the actual device you’ll need is a portable water pump.