All You Need to Know About Algaecides

Keeping your swimming pool hygienic is all about proper maintenance. Besides useful equipment to keep it clean, you also need the correct chemicals. When your swimming pool has lost its chemical balance, there is probably something wrong going inside. 

When you leave your pool without emptying, it will naturally change its color due to microbial infestation. Keep your worries aside, for it is time to stop microbial growth. At this point, you will need the correct algaecide for your pool.  

Algaecides and Their Working Procedure 

Do you own a swimming pool, but do not know about algaecides? Well, you have a lot of information to gather. For curious swimming pool owners like you, algaecides are no less than a magic bullet. 

Whether you own an above-ground or a concrete swimming pool, it doesn’t matter. A quality algaecide works on all types of swimming pools perfectly. However, there are several types of algae size in the market that promises to be the best. 

The working procedure of an algaecide is very complex to understand. A large proportion of these treatment solutions are made from metallic acids. Algaecides have copper as the central atom, which makes it preventive against all kinds of algae. 

You might also find some algae size with organic compounds as the main component, followed by hydrates. These organic algaecides have less preventive potential them the inorganic ones. If you have a piece of sound knowledge in chemistry, these terms might be easier for you to understand.

The principle to kill any microbe such as algae is to hinder their cellular mechanism. Algae size usually does this task by breaking their cell wall, which makes them vulnerable. There is enough research to show that these treatment solutions also disrupt cell division. 

So, without a complete mitosis cycle, it becomes impossible for the algae to reproduce. At last, the algae cell becomes unable to transport energy, and it eventually dies away.

But the black algae are the most stubborn of t species and are very difficult to kill. 

On using organic algaecides against black algae, you might not be successful in killing it altogether. It is because the cellular structure of black algae is composed of complex protein molecules. 

If you establish your swimming pool in an area having moisture and high metallic content, the oxidation will be faster. It is because your pool gets exposed to metallic oxides 24×7. In this case, using an inorganic algaecide might be beneficial, but you must work more to remove the stains. 

Some Best Algaecide in The Market

#1 Pool RX 101001 

The Pool RX 101001 has a good reputation in the pool market as the best-selling algaecide. It prevents algae by hindering the reproduction process that eliminates it from the root. Even if you have low chlorine levels in your swimming pool, the Pool RX 101001 works fine. 

The best thing about this algae treatment solution is its homogeneous nature. It mixes evenly with the infected water body of your pool. Moreover, the Pool RX 101001 lasts longer than other solutions in its segment. 

You can also use the Polaris to clean your filter and backwash your pool. It can provide an impressive sanitizing capacity of 20,000 gallons of water. The company also gives you booster minerals to sanitize larger pools. 


  • Impressive sanitizing capacity
  • Solutions last longer 
  • Has a homogeneous mixture 


  • Encourages calcium formation 

#2 Clorox Pool&Spa 43128CLX 

If you are tired of using different types of algaecides, try the Clorox Pool&Spa 43128CLX. You might get good results with this one because it comes with a clarifier. The company introduced the clarifier to get more transparent pool water by getting rid of stubborn algae. 

The best thing about the Clorox Pool&Spa 43128CLX is that you can use it even for salt pools. If you use this algae treatment solution once a week, you can expect faster results. Unlike Pool RX 101001, the Clorox Pool&Spa 43128CLX doesn’t dissipate calcium precipitates. 

Since it is not a chlorinated algaecide, the 43128CLX might alter the pH levels in your pool. Nevertheless, this algaecide is an ideal option to sanitize any pool having a capacity of 10000 gallons. For pools before that capacity, you must use 1/4th of the dose. 


  • Suitable for all pool types 
  • Eliminates algae faster
  • Has a clarifier to clear cloudy water 


  • Alters the pool’s pH level 

Algaecide and Its Several Types

If you have decided to invest in pool algaecides, better make the correct choice. You will find a plethora of different algaecides in the vast pool market. The common thing about all treatment solutions is that the parent company claims it to be the best. So, here are the common types of algaecides available for you to pick. 

#1 Quaternaryernary Ammonium Algaecides

Quaternary pool algaecides use ammonium as their main component to disinfect pools. To be more specific, these treatment solutions contain quaternary ammonium salts. However, you’ll find the working procedure of these algaecides interesting. 

Usually, algae cells have a negatively charged nucleus that attracts the positively charged ammonium compounds. It makes the ammonium compounds attach to the cell membrane and the cell wall. Slowly, the positively charged ammonium compounds diffuse into the cell to break its mechanism.

After breaking the cell wall and the membrane, the Quaternary pool algaecide makes the algae cell vulnerable. Ultimately, the ammonium salts make way for chlorine to kill the cell nucleus. You can get this reliable algaecide only in 10% and 50% concentrations only. 

#2 Metallic Algaecides 

All metallic algaecides have copper as their central atom, which is a reliable component since time immemorial. The principle of the working procedure of metallic algae is somewhat like the former. Copper ions are positively charged and get attached to the amino acids of the algae protein. 

The central copper atom gets electrically diffused inside the cell to hamper cellular activities. It starts its invasion by destroying the cell wall, followed by attacking the nucleus. If you search for a specific treatment solution to get rid of black algae, metallic algaecides are just for you. 

It is because no other algaecide performs best to get rid of black algae. You’ll get metallic algaecides having a concentration range between 7-9 percent. Moreover, due to its high mobility, the metallic algaecides are successful in eliminating algae blooms. 

#3 Polymerized Algaecides 

Just like ammonium algaecides, the polymerized variant is also quaternary. However, these algaecides have a more complex chemical structure than ammonium ones. Unlike metallic algaecides, polymerized algaecides won’t stain your pool and don’t form any foam.

Polymerized algaecides are negatively charged, and they kill by surrounding the algae cells. Due to excessive repulsion, the cell wall of the algae gets crushed and destroyed. 

Unlike all other algaecides, the polymerized variant is available in two types. You can purchase these in 30% and 60% concentrated strengths. The best thing about polymerized algae is that it can be used in any season. 

Whether it is summer, winter, or spring, polymerized algaecides will get you covered. These algae treatment solutions are costly than the rest options on the list. Therefore, it might not be for someone who has a tight budget to maintain their pool.

#4 Sodium Bromide 

The component called Sodium bromide can be used as an algaecide to maintain your swimming pool. It has bromine that shares the same electrovalent properties as chlorine. Sodium Bromide is also a valuable component used to shock swimming pools.

To be more specific, Sodium bromide is a strong catalyst that gets attached to the algae wall. Due to its electronegative character, Sodium bromide can quickly destroy the complex protein structure of the algae wall. In general, people don’t use bromine to get rid of mild algae infection in their pools. 

You should only use it when your swimming pool is severely infected by microbes such as black algae. Many people also use it when the condition gets worse to algae blooms.

The Correct Time to Use an Algaecide 

You must keep in mind that treating your swimming pool with algaecide is as essential as chlorination. Not everyone likes to use pool chlorinators to sanitize their swimming pool. If you are one of them who doesn’t like its disgusting smell, switch to algaecides. 

Instead of chlorination, you have to apply algaecides to your swimming pool regularly.

For decent maintenance, you should add algaecide in your pool at least occasionally. However, if you take an expert’s advice, they will probably recommend chlorination. 

When chlorination turns out to be a failure, it’s time to introduce algaecides to your pool. However, these treatment solutions aren’t the primary option. But an algaecide is a necessity after you treat your swimming pool with a shock. 

When you are out for your vacations and leave your pool in its full state for weeks, don’t expect it to be clean. It is when you must use an algaecide to get rid of the disgusting algae blooms. The darkroom is an ideal environment that encourages the growth of algae. 

Moreover, when you decide to winterize or shut down your swimming pool, you’ll need an algaecide. If you drain your pool well with proper chlorination, you don’t need to use algaecides anymore. 

Which Is Better: Chlorine or Algaecides? 

Well, the above question might be made you confused about which the better product is. Without a proper context, it is tough to understand the pros and cons of chlorine and algaecides. If you look at it from a regular context, Chlorine is the better option than algaecides. 

However, chlorine can only help you sanitize your pool when the situation is under control. To make the situation under control, you should chlorinate your swimming pool regularly. Once there is an exponential growth of algae in your pool, it is better to use algaecides. 

Chlorine has greater electronegativity and oxidizing power than algaecides. It has only one principle to attack and eliminate algae cells. On the other hand, algaecides are of different types, and they work in different ways.

When it comes to water clarity, chlorine becomes a better option than algaecides. After chlorinating your pool correctly, you’ll notice the cloudy color of the water disappears. Using algaecides also clarifies your water, but not like a chlorinator. 


The growth of algae in swimming pools is not something new. If you keep the chemical levels of your swimming pool balanced, there isn’t any high chance of algae growth.

After keeping proper maintenance, you won’t require any algaecide to get rid of stubborn algae. 

Don’t forget to shock your pool correctly before applying concentrated amounts of algaecide. When you’re dealing with the classic mustard or brown algae, a good pool shock will work. But, when a stubborn bacterium such as black algae is on the move, bring the algaecide into action. 

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