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Top 6 Best Pool Algaecide In 2021 Reviews

If you own a pool, we can all agree that you must have faced tough times with pool algae. It can be annoying, ruin the look of your pool, and is also unhealthy.

Algae can reproduce in a very short time with the right environmental conditions. These include warm temperatures, sunlight, failing circulation and filtration systems. Presence of phosphates in the water is also a major cause.

Have you made many failed attempts to get rid of pool algae? Can’t find the best pool algaecide? In this post, we’ll review some of the best pool algaecides that can help you get rid of pool algae!

best pool algaecide

Top 6 Best Pool Algaecides On The Market In 2021 Reviews

1 Clorox Pool&Spa Green Algae Eliminator

This algae eliminator by Clorox will help keep your pool clean and fresh. Algae grow rapidly, which is why you need a fast-acting algae repellent such as this one. This product is for both prevention as well as treatment.

For treatment, you should pour the liquid on the areas most affected. It requires brushing and scrubbing within 24 hours. For treatment, you can use up to 1.5 ounces of this fluid with every 10,000 gallons of water.

Weekly usage of this fluid is more than enough.

Clorox Pool&Spa Green Algae Eliminator

Our rating:3.7 out of 5 stars (3.7 / 5)

  • This product helps you stay a step ahead of algae reproduction. You can use this as a preventative measure or treatment, or both
  • It does not foam when it is poured into water.
  • Fast acting
  • Using this product alone cannot help. You need to take other maintenance measures as well. More about this later!
  • Can make pools messy

2 In The Swim Super Pool Algaecide

This non-foaming algaecide by In the Swim promises to get rid of most kinds of algae in your pool. The product comes with safety assurance. So, you can swim in the water soon after the fluid is added to the water. No more waiting!

The high copper concentration can kill algae in a matter of hours. So, shortly you will be free of algae infected pool water. With higher concentration levels, a lesser amount of the fluid is needed to do its job. It is fast acting and effective.

In The Swim Super Pool Algaecide

Our rating:4.4 out of 5 stars (4.4 / 5)

  • This algaecide can kill all types of algae including stubborn black algae
  • Higher concentration than most products
  • Safe to use
  • Non-foaming formula
  • Available in different quantities, so buy one according to your need
  • The main active ingredient is copper Triethanolamine Complex. It is faster and stronger than other products on the market
  • Ideal for springtime pool maintenance
  • May turn the pool water green in color
  • Not the cheapest option

3 Kem-Tek KTK-50-0006

Buying a kem-tek product for pool maintenance is the best choice, considering its 24/7 customer service. This is a non-foaming algaecide. It is best for prevention, maintenance and treatment purposes. You can get clean water in 5 easy steps!

It is 60% concentrated. It is one of the quickest and effective product for treating algae infections in pools.

Apart from fighting algae, it can make your pool water crystal clear. It does so by absorbing oils and clearing scum lines. The product can also absorb dirt from filters.

Get a better looking and clean pool with the Kem-Tek algaecide.

Kem-Tek KTK-50-0006

Our rating:4.2 out of 5 stars (4.2 / 5)

  • Non-foaming as well as safe
  • Makes water crystal clear
  • Long lasting effect
  • Works on all types of pool water
  • Also suitable for above ground level pools
  • Compatible with salt system pools
  • 24/7 helpline
  • With 60% concertation, the product may not show much satisfying results in the long term.
  • Is effective only on small amounts of algae
  • Requires brushing as well as scrubbing before using the product
  • May not work for mustard type algae
  • You may have to wait before you can use the pool again

4 United Chemical No Mor Problems

This algaecide ensures your pool’s safety from algae. It also ensures that once the algae is gone, it does not return.

Other than fighting algae, this United Chemical also works on mold and slime.

It is an all-in-one package for your pool’s protection!

The main active ingredient in this product is Sodium Bromide. Overall, it contains no ingredients that could be of potential damage to your water. It will also not stain your pool.

With regular and proper use, the product can provide you with crystal clear water for a long time.

The algaecide is so effective as well as efficient that it will reduce your need to clean your filter. It also does not need any thorough brushing or scrubbing like most other products on the market.

United Chemical No Mor Problems

Our rating:4.6 out of 5 stars (4.6 / 5)

  • Effective
  • Can fight more than one pool related issues
  • Will not stain or damage your pool
  • Suitable for all types of pools
  • No clear instructions are given about the dosage of the product

5 PoolRx Algaecide Unit

This product can handle pools with up to 7500 to 20000 gallons of water. This makes it a very powerful product. The product is added to a pump or skimmer baskets, where it does all its magic.

Each unit works individually. PoolRx units can last up to 6 months each!

It has a long-lasting effect. Its strong ingredients kill algae and ensure it does not return. The product is easy to use. So, once you put it in the right place, the unit does all the work.

4-6 months after, you can use the PoolRx Booster to replace minerals in the water.

PoolRx Algaecide Unit

Our rating:4.3 out of 5 stars (4.3 / 5)

  • Easy to install and use. Thus, maintaining the pool becomes easy
  • Long lasting
  • Ideal for large as well as small pools
  • Works on all types of algae
  • The larger the pool, the more time it takes to start working
  • High concentration of copper
  • To remain efficient, it may need you to brush and scrub the pool on a regular basis

6 REVIVE! Swimming Pool Phosphate and Algae Remover

This algaecide by REVIVE identifies and tackles the initial stages of algae production. It targets problems at an early stage like the presence of phosphates. It also cleans any organic debris and cloudy matter.

Algae can be impossible to get rid of when it has advanced. Thus the REVIVE algaecide gets rid of any potential threats.

Algae feed on phosphates. Thus, REVIVE makes sure there is no phosphate in the pool.

REVIVE! Swimming Pool Phosphate and Algae Remover

Our rating:3.9 out of 5 stars (3.9 / 5)

  • Gets rid of algae as well as their breeding grounds in early stages.
  • New pools need such algaecide to avoid any future major issues!
  • Non-foaming product
  • Not suitable for older, more affected pools or areas.

Best Pool Algaecide Buying Guide

It is very easy to get confused with the range of options you get in the market. It can also be difficult to identify key differences between different products. In fact, they could even appear all the same to you.

Well, the choice you will make depends on your pool’s condition and its need.

There are many factors you should consider before buying any algae eradicator.

Best Pool Algaecide Buying Guide

  • Type of algae

There are 4 main types of algae. These are green, black, red, and yellow algae. Different algaecides work on each type. So, you must identify the type of algae in your pool before you buy an algaecide.

It is also possible for your pool to be contaminated with other bacteria. So, you might need a specific eradicator.

You can identify the presence of bacteria in your pool if the color of the algae is somewhat red or pink.

  • How pool friendly is the product?

Algaecides contain chemicals and minerals that could damage your pool’s structure. In fact, they might even damage filter systems. So, ensure the product you are buying is specific about being pool friendly.

Other than that, you also need to ensure that the product you’re using is safe for users.

  • Non-foaming

Quat pool algaecides foam your pool water if they are overused. As a result, this will stop you from using your pool any time soon. In fact, it can be unsafe as well.

There are non-foaming algaecides in the market that are recommended over foaming ones.

In fact, polymer Pool Algaecides are known for their non-foaming quality.

  • Does it only kill algae?

Your main motive is to get rid of algae. But, don’t forget that there is more than that in your pool. There are many microorganisms and organic debris that your filters are unable to get rid of. Pick an algaecide which can also fight these issues like debris and mold.

  • Cost

Generally, algaecides are not very expensive. But you may have to buy them more than once, and over time, this becomes a high maintenance cost.

So be wise when picking an algaecide, keeping in mind the long-term use of it.

  • Long lasting?

You don’t want to spend most of your time maintaining your pool. So, make sure the product you chose has a long-lasting effect and stops algae from reappearing.

Algaecides that have a lower concentration may not be suitable for you if you’re looking for a long-lasting product.


Pool algae can be stubborn and bad for your pool. If it’s not stopped or removed, it can make your pool an unsafe place for users. Removing algae from your pool is not impossible.

A range of algae repellent products is available in the market. So, you need to know your pool’s needs and product’s specifications, and you are good to go!

Algaecides are often used to fight pool algae, but they alone can’t do the work. Your pool requires regular and consistent maintenance.

And as people say, prevention is always better than treatment!

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