best way to kill algae in pool
Pool Knowledge

Best Way to Kill Algae in Pool

In a swimming pool, algae can be a real issue. If water has already turned green due to floating algae, you may have to use multiple chemicals to address the issue. Killing or preventing algae is easy if you know the right way to maintain a pool. In this post, we are going to show you the best way to kill Algae in Pool. 

Best Way to Kill Algae in Pool

Killing algae with chlorine

In a swimming pool, algae can be a real issue. If water has already turned green due to floating algae, you may have to use multiple chemicals to address the issue. Preventing algae is easy if you know the right way to maintain a pool. In this post, we are going to show you the best way to kill Algae in Pool. When it comes to killing the first thing that comes to mind is to use chlorine. Here is how you can do it.

Make chlorine your primary ingredient to kill algae

If the pool water contains algae clumps or looks green, you will need to use chlorine. You can bring the pool back to a good condition by shocking it with enough chlorine. It can take effect in a couple of days. However, it will take longer if the conditions of the pool are poor. For quick results, you can buy some high-quality algaecide. There are some other methods that are faster but they may not be able to resolve the sanitation issues. If you apply those methods, you may have to deal with some side effects.

Use a brush to clean the walls and floors

Remove algae by vigorously brushing the floor and walls. In this way, you can clear the algae in a short time. Pay attention to the behind ladders, steps, and corners. You also have to be careful about the selection of the brush. If it is a vinyl pool, use a nylon brush. And if it is a concrete pool, use a metal brush. In a sense, using a brush is the best way to kill algae in pool.

Check the pool chemical safety

When applying this method, you will have to handle some potentially dangerous chemicals. So, before you dive into action, reading the safety information is of utmost importance. Here are a few safety standards to keep in mind:

  • Wear clothing that properly covers your skin. Wear eye protection and gloves. And once you have used the chemicals, make sure you wash hands. Even if you are using the best way to kill algae in pool, do not ignore these protective measures.
  • Do not handle the chemicals in windy weather. And do not inhale them. 
  • When you add these chemicals to water, avoid placing wet scoops in the container. 
  • Make sure the chemicals are stored in fireproof containers. There are some chemicals that react quickly to other chemicals, leading to explosions. 

Adjust the pool pH level

You can easily do it with a swimming pool pH test kit. If the level is above 8, you can use a pH reducer to lower the level. Sodium bisulfate is a very effective PH reducer. It will significantly reduce algae infestation. Give this chemical a couple of hours to work. And after that time you can test the pH level again.

It is important to know that paper test strips do not provide as accurate results as test kits with droppers or tablets. If the level of alkalinity is still above 120 ppm, read the instructions on the pH reducer label. There you will learn how to bring the alkalinity level down to 80 ppm.

Choose a chlorine product

For a shock treatment, the chlorine that is regularly used for pool treatment is not the best choice. For a swimming pool, a liquid chlorine product is a better choice. Here is a liquid chlorine product that can help you get the job done.  A liquid chlorine product usually contains calcium hypochlorite or sodium hypochlorite. Please be advised that calcium hypochlorite is not intended to be used to treat hard water.

These products are usually flammable. Although lithium is safer, it is somewhat expensive. Do not use a tablet or granular chlorine products, because these products usually contain stabilizers.

Add a large dose of shock

Check shock instructions on the label of your chlorine product. If the algae are dense, you can use twice the amount recommended for a regular shock. If the water looks very murky, you can use 3 times the amount recommended for a regular shock. The shock can be added directly to the pool while the pool filter runs.

If liquid chlorine touches chlorine granules or tablets, it can produce gas that is corrosive. So, if your pool skimmer contains granules or chlorine tablets, avoid pouring liquid chlorine. Shocking is more effective when it is added at night because the UV rays of the sun make chlorine less effective.

Test the pool after 15-20 hours

When the pool filter works for 12-24 hours at a stretch, you should seriously consider examining the pool. You will notice dead algae turning grey or white, and it will settle on the floor. Even if the algae are not dead, it is important to check the pH levels.

If the algae persist but the chlorine levels are above 5 ppm, try to maintain the current level for a few days. If the chlorine levels are under 2 ppm, wait for the next evening and then shock the pool again. If the chlorine levels do not change, cyanuric acid may be the root cause of the problem. Shocking repeatedly is the most effective way to fight it.

In a sense, shock treatment is the best way to kill algae in pool. Your chlorine may become less effective if there are large amounts of litter in your pool. If the pool remains unused for a long time, several shock treatments may be needed to resolve the issue.

Brush the floors and walls regularly and test daily

To prevent the growth of new algae on the wall, brush the walls vigorously. The chlorine will take effect in a couple of days, and the algae will go away. To make sure that the chlorine level is acceptable, consider testing daily. In an ideal swimming pool, the values should be as follows: alkalinity: 70-120 ppm, pH: 7-7.6, and free chlorine: 2-4 ppm.

Vacuum the dead algae

If the green color is no longer visible in the pool, it is time to vacuum up the dead algae and make the water clear. You can use a robotic vacuum cleaner for swimming pools to do it. If you leave it to the filter, make sure that the filter is powerful enough. It may not be easy to get all the algae. In such a case, consider using flocculant or coagulant. They can make the algae clump together.

Final Thoughts On the Best Way to Kill Algae in Pool

 Killing algae in a pool is easy if you know what algae actually are and what products can kill them. You can do it without purchasing a fancy product, but a ready-made product can make the job a lot easier for you. We hope you will efficiently deal with the issue.