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How To Clear Up Green Pool Water

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A Few Reasons Why Algae Invades Pools

How To Clear Up / Clean “Green Pool Water” (How To Shock A Pool) easily

The simple, but annoying, reason for a green pool is usually due to the lack of sufficient water testing and sanitizer. When your pools sanitizer and chlorine levels fall below optimal levels, or the chlorine becomes entangled with other chemicals in your pool, you open the door to your tiny green nemesis.

The sanitizer makes your pool inhospitable to algae and kills it.

If youre not testing often enough and not adding enough bromine or chlorine , youre at a high risk of getting algae in your pool.

But you test regularly, all the time, you say? Well, thats not always enough.

Mother Nature rarely keeps to our schedules, and your testing regimen is another one shell ignore. Many things make your pool more likely to need extra testing, as they make algae blooms more likely.

  • Extreme Heat/Weather Changes
  • A Dirty Pool
  • Incorrect pH Levels
  • Clogged Pool Filter

If any of these things are occurring in your area or your pool, you are more likely to face an algae bloom, and you want to test more often. Daily or every other day isnt going to be too much.

Use Flocculant To Clear Up The Algae

Youve disarmed the enemy , but its presence still lingers.

The best way to clear out the rest of the pool algae is to use a pool flocculant.

Flocculants are normally used to clear up cloudy white swimming pools. They work by clumping particles together and sinking them to the bottom of your pool making it easier for you to clean up and filter out.

Use 1 2 treatments of pool flocculant depending on the severity of the pool algae. After adding it to your pool, give the flocculant some time to settle in.

Once you see the algae sinking to the bottom, its time to finish the job.

You Didnt Brush Thoroughly

Like a toothbrush is to healthy teeth, a pool brush is to a healthy pool.

From algae, to pollen and other organic debris, your pool walls might still have stuff stuck to them thats causing the green water.

This will be especially present in the pools dead spots. These are areas where the circulation system doesnt quite reach, allowing for pollutants to build up.

When it comes to pool brushes, make sure you have the correct one for your specific pool finish. Steel bristle brushes are ideal for hard surfaces like plaster or concrete, while softer bristles work well for finishes like tile.

The last thing you want to do is scratch your finish or have an inadequate cleaning tool!

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My Swimming Pool Is Green How Can I Fix It

Take your pool from green to clean.

Whether your pool water is green from being covered all winter or you wake up one morning to find it turning a pale shade of green and watching, desperately, as it gets greener and greener no matter what you do.

If you have green pool water preventing you from diving in, here are a few simple steps to follow to get your pool sparkling blue once again.

Cleaning A Green Swimming Pool

How To Clear Green Water in Your Pool in 2020

In any event the reasoning why your swimming pool water is green or if youre just wondering how to clean a green pool quickly you need to follow the same steps. Even when you come to the realization that cleaning your green pool is a job left up to the professionals, we follow the same method as the one details in this post, but, in severe circumstances drain the pool and power spray the pool and pool tiled areas until they are clean.

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Pool Still Not Clear After 5 Days

If you have followed all the instructions and your pool isnt clear in 5 days, then you could have pump or filter issues. Call a pool repair company to avoid any more damage.

You have spent a lot of money at this point and have to let a professional handle it. Your pool technician will give you a pat on the back for trying and then clean it the way it needs to be. That is why they are professionals, they have the experience needed to clear green water and dirty pools.

Maintain Your Clear Pool Simply With Arm & Hammer

  • Follow the tips in our complete Pool Maintenance Guide to keep your pool clear and balanced all season.
  • Use ARM & HAMMER Clear Balance Pool Maintenance Tablets weekly to help maintain stable pH and alkanity levels.
  • Keep a pool maintenance-sized bag of ARM & HAMMER Baking Soda with your pool chemicals to raise alkalinity and pH of your pool water, or as a spot algae scrub when needed.

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Test The Water For Ph And Alkalinity

Using test strips or a liquid test kit, test the pH and alkalinity levels. Note the levels as youll refer to them later.

If you want to, you can also note the chlorine level. Were willing to bet its going to be too low or even nonexistent. If the sanitizer level was where it should be, you wouldnt be dealing with algae. It also wont matter once you get to the next step.

Note: Testing the water could be the first step. If youd rather test, then vacuum, then brush, go for it. It wont affect the algae removal process.

How To Clean A Green Pool Fast

How to Clear Up Green Swimming Pool Water Pt. 4

If youre searching for how to clean a green pool fast this post should help! Cleaning a green pool can be a challenging thing to do because this could be caused by weeks or possibly months of pool neglect. Subject to how bad the water is it could be something you can take on yourself, but if you have attempted previously with no results, it might be time to contact pool cleaning experts like Pool Service Gilbert particularly if you live around the Phoenix metro area.

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Why Is My Pool Green

Looking at your green pool, you may scratch your head and wonder why? What makes swimming pool water green you might ask. The answer is there are many things that cause pool water to become green.

One of those reasons is algae. You know its a part of owning a pool, but why did it get so bad that your pool turned green? Continue reading to learn ways to fix green pool fast and safely.

The reasons algae grows or overgrows, varies. It could be due to pool owner error, chemical imbalances, or even the weather. Here are a few of the most common reasons:

  • Imbalanced pH Levels You dont want a pH thats too low because it will cause irritation to anyone in the water, especially the eyes. But, if the pH is too high, it causes skin irritation, and allows bacteria and algae growth, aka green pool water.
  • Non-Working Filter Check your pool filters often. If you dont, they could easily clog up, which means the algae doesnt filter out of the pool. Not only that, but youll have an overgrowth of bacteria, which means unsafe pool water, not to mention its abnormal green color.
  • Warm Weather You want the weather to be warm for swimming, obviously, but drastic changes in the weather or humidity levels calls for more frequent and thorough cleanings as algae thrives in warm, humid temperatures.

Fortunately, there are ways to clear green pool water and not lose too much precious swimming time. Lets check out how to clean a green pool fast.

Assess The Situation: Do You Need To Drain It

Nobody wants to drain their pool if they can help it. To know whether or not you have to drain, start with this question:

On a scale from a greenish haze to I think a swamp thing lives here?: How green is green?

Ive found, if you can see more than about the depth of a grown mans spread hand into the water, chances are its not a lost cause. That means that you probably wont have to drain your pool. If, however, you cant see that far into the water, you may need to drain, and acid wash it.

You can, however, try to clear the green pool water first, before choosing the nuclear option. You can check your filters here too, and clean them up for the next step if you wish.

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What Causes Pool Water To Turn Green

There are three reasons why pool water goes green.

A Lack Of Chlorine

The first, and most common, reason why pool water goes green is a lack of chlorine. Without chlorine in the water the pool will quickly start to grow algae. If chlorine is not added to the water once this process starts, the algae can grow to a point where the entire pool turns green within a day. The warmer the water is, the faster this process will be.

Note: Water without chlorine, especially if it has an algae bloom, is unsafe to swim in, and can be a breeding ground for mosquitoes and other insects.


The second reason why pool water might look green is pollen. Pollen is produced by nearby plants and trees and is carried into the pool water by the wind. Since pollen is too small for a standard pool filter to remove, the amount of pollen will continue to build throughout the year.

As the amount of pollen builds up in the water it begins to settle on the liner, and can be mistaken for either green or mustard algae. If the pollen level continues to build it can eventually turn all of the water in the pool green. Fortunately, pollen is completely harmless and has no ill effects on the yourself or the pool.


The last cause of green pool water is metals, usually copper. Metals can be introduced through many sources such as source water, cheap algaecides, or if the water is acidic, from the metal components of the pool such as copper heater elements.

Fixing Cloudy Green Pool Water

Green Pool Water: How To Clear A Green Pool In 5 Days

There is some water worth fixing and some that is too far gone. You can fix green pool water by using appropriate chemicals and filtration if it has not been green and cloudy very long as in weeks .

Your pool may be a better candidate for a drain and acid wash if:

1.) It is a dense and dark green where you cannot see more than a foot or two into it.

2.) It has algae built up on the walls and surfaces in a carpeting affect.

3.) It has more than a few contractor size trash bags of debris at the bottom.

4.) You have a sand filter.

If you have #1 or #2 going on then I would suggest a drain and acid wash right off. If you have #3 and / or #4 can mean it takes a lot more time and money to turn it around and that money and time might be better spent on a drain and acid wash if you can get that done for just a little more.

To fix cloudy green water:

1.) Make sure your filter is running properly and the pressure is not too high. Backwash it if you have that option before starting this process.

2.) Make sure the skimmer baskets and pump basket are empty.

3.) Set your pool to suck from the main drain. Try to get approximately ½ the suction from the drain. You may need to shut off the skimmers ½¾s of the way each to pull more from the drain. This is important to get the cloudy water pulled out of the pool and through the filter.

4.) Shock the pool and add some algaecide or yellow out depending on the color of algae.

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Fourth Step: Pump And Filter

Why is my pool still green after adding chlorine? Check your filter for clogs from the haze-jade green water. So depending on your filter, run it for a few days like you would do on ordinary occasions. If you want quick results, backwash your filter four times. Make this frequent to prevent your filter from clogging.

Run The Pump & Adjust Calcium Level

Turn on the pump and let it run for at least 8 hours. Calcium is your friend in the fight against copper, so use calcium chloride to raise the level to 350 ppm if its low.

With calcium chloride, 2 ounces per 1,000 gallons will raise the ppm by 10. So if you want to raise it 50 ppm, use 10 ounces per 1,000 gallons.

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How To Get Rid Of Green Water In A Swimming Pool

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It’s never fun to pull back your pool cover and see that the water has turned green and swampy. That means algae has temporarily taken over, and you’ll need to thoroughly clean and treat your pool before you can start swimming. Read on to learn how to get rid of the dreaded green water.

How To Clean A Green Pool With Bleach

How To Clear Up Green Swimming Pool Water Pt. 1

Some of you may wonder, is bleach good enough to solve the green pool problem? The answer is yes. Bleach contains 50% of chlorine which is contained in liquid chlorine for the swimming pool. It has 3 powers that can kill the algae, which are:

  • Sanitizing keep the hygiene of the water by killing microorganisms
  • Disinfecting help to kill living contaminants that may carry diseases.
  • Oxidizing eradicate waste and ammonia excreted by the swimmers.

Using bleach is only effective for green algae, the least severe case of the problem. If you experience much worse kinds of algae like the ones with black and yellow appearance, you may need a more complicated solution.

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Getting Ready To Treat The Pool

  • 1Test your swimming pool water. Use a chemical test kit to test the chlorine and pH levels and determine the extent of the problem. When chlorine levels drop below 1 ppm, it can cause algae to grow in the pool, turning the pool water green. When this happens it is necessary to “shock” the water with chemicals to kill the algae and return the pool to normal chlorine levels.XResearch source
  • Proper pool maintenance, including having working filters and making sure your pool’s chlorine and pH levels remain steady, can prevent algae from growing in the first place.
  • Algae is constantly growing, so letting your pool sit without maintenance for even a few extra days might create a green pool water situation.
  • 2 Balance the pool chemistry. Before treating the pool, balance the pH by adding either an acid or a base to bring the level to just around 7.8. This is at the high end of the range you would normally want in your pool, but that’s necessary when you’re treating it for algae. Here’s how to balance the pH:XResearch source
  • Turn on your pump so the chemicals will circulate throughout the pool.
  • Correct the pH level by either increasing the pH with sodium carbonate or decreasing it with sodium bisulfate.
  • Scrub especially well in areas where you can see algae buildup. Try to break it all up so that the pool gets thoroughly clean.
  • If you have a vinyl pool, use a nylon scrub brush. Wire brushes might damage vinyl pools, but may be used on plaster pools safely.
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    Put Algae Repellent In The Pool:

    Once you have removed all the algae from the pool, you should immediately add an algae repellent in the pool water to prevent the formation of new algae.

    To do this, first turn on the filter pump, then add the algae repellent to the skimmer so that the agent is evenly distributed in the entire pool water.

    And lastly, filter the water completely. As far as the dosage of the algicide is concerned, it is best to follow the manufacturers instructions again.


    Your Chemistry Is Still Out Of Whack

    How to Clear a Green Pool

    Assuming your water was green, then restored, and then went back to green, thats a strong indication youre having issues with your pool water chemistry.

    Water testing and staying on top of the appropriate chemicals will be needed to balance the water, including:

    • pH level: A pools pH level can make or break the water, and a properly balanced pH level is imperative. The recommended range is between 7.2 and 7.6, with 7.4 being ideal. If the water drops below this range, it becomes acidic, and if it spikes above this range it becomes alkaline both of which present challenges with water color .
    • Chlorine level: Sanitizer must always be present in the pool, but too much chlorine can cause hazy green water, and lack of chlorine will be insufficient, making way for algae. The minimum level of chlorine should be 1.0 ppm, with 3.0 being the top end. Of course, if shocking the pool youll temporarily have higher levels present, and you should wait until the chlorine levels out before going swimming again.
    • Cyanuric acid: Otherwise known as pool stabilizer, CYA extends your chlorines lifespan, protecting it from the harmful UV rays of the sun. But if too much CYA is present, it will lock the chlorine molecules, and the chlorine will become ineffective. Ideally, you want CYA to be testing at 50 ppm. If too high, the only way to bring it down is to dilute the pool.

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