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Algae in an Above Ground Swimming Pool

Category Miscellaneous
Filter systems in above-ground pools are often not as robust an in-ground pool. This can make algae growth more of a possibility. This is a page about algae in an above ground swimming pool.


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By 0 found this helpful
September 16, 2010

I have an above ground pool. Can I use household bleach to kill algae? My pool is overrun with green algae. Thanks.

By leveman3 from Lebanon, TN


September 18, 20100 found this helpful
Best Answer

No on chlorine bleach! It's not healthy for humans or the environment! Go to your local pool supply company and ask them what products you need to get rid of the algae and what products for maintenance thereafter. They also carry long poles with special pads on them that you run along the bottom and side pool surfaces that help loosen the algae and should also be used for regular maintenance.

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September 18, 20100 found this helpful
Best Answer

Never mess around with chemicals, unless your pool dealer has them in stock. The first step is to bring a sample of your water to determine the right course to clean up the algae, or other problem you may have. Otherwise you are making a possible toxic soup which may harm humans, or destroy the pool. Trying to save a few dollars may cost bigger bucks in the end. I have a friend whose well meaning, but clueless husband "dumped" every product they had bough for the pool, all at once!


He figured this would keep the pool clean while they went on vacation. Upon returning home the pool was like a bubble bath, and not usable for several weeks after. Then an algae problem developed and that was the end of the pool season. I check my water every other day, and if something needs to be added I do it then. Always read the instructions as to the amount and how to use it etc. Good luck to you!

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By 0 found this helpful
August 19, 2019

I am constantly getting green and cloudy water in my pool. I shock and algaecide about once a month. Lately every 3-5 days I run the filter 12 hrs a day. The last two weeks I have also been adding Clear View and also vacuuming about 2-3 times a week and then backwash after vacuuming.


August 19, 20190 found this helpful

Chlorine will get rid of the algae.

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August 19, 20190 found this helpful

There are tons of questions Id have to ask prior to giving a solid answer on this one. Questions regarding chemistry, pump, frequency of chemicals, etc.


My best TIP: Do not buy chlorine from big box stores. Its old and overpriced. Always get it from your local pool supply store. Also be sure to store it properly. Have you tried liquid chlorine?
Algae is tough to combat. It thrives in still water and in warmer temperatures. When you shock it do you let the pump run for at least 12 hours? That is crucial! The algae settle to the bottom by this point.
So add your liquid chlorine.
After 12 hours of the pump running, let it sit still for a few hours and then vacuum it (preferably into your yard).
Then you want to clean the filter.
Youll still need more chemicals to rid your system of the dead algae.
Check your chlorine level the next day and repeat the above but try to keep your chlorine level steady and consistent.
Once everything is good you just have to stay on top of it.

Have you ever drained the pool and started fresh?

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August 19, 20190 found this helpful

I second what kdaniels says that this is not an easy answer.

When you are buying your supplies from your local pool supply place, talk to them and get their suggestions to resolve this issue.


We have been having so much rain in my area that everyone with pools is having issues. They can keep their pools clean until the next storm and then it all starts over again. One friend said covering the pool helped, but that isn't always an option.

Post back what you learn as your info may be better than what my friends are getting around here!

Good luck!!

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August 19, 20190 found this helpful

You have a chemical inbalance in your pool and need to test your water with a test kit. The test dit will help you determine how much more chemicals you will need to add t othe water to get rid of your algae problem. I have a small above ground pool and holds around 900 gallons of water. I do not use chemicals in the pool because it is not that hard to change the water once a week. I do find that adding some vinegar to the water during the real warms months of the years helps to control the algae longer and I do not have to emapty and change the pool so often. I know it sounds bad to most people to dump 900 gallons of water once a week. However, where I live is in the topics and the amount of rain we receive here makes it possible for me to do just that.

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September 16, 20100 found this helpful

We have a very large above ground swimming pool. Does anyone know how to get them clean after algae has gotten in? We have used Shock It and chlorine and clarifier. Still green. Thanks.




Algae in Above Ground Swimming Pools

We have a smaller blow-up style pool that is about 3 1/2 ft deep and when we first got it we never had a problem. It was in our yard on some sand. The kids kept getting sand in the pool so we moved it to a grassy area and now it gets algae.

Last week I added about 1-2 c. bleach and have not had any trouble since. (07/13/2004)

By Tawnda

Algae in Above Ground Swimming Pools

There is something that is used to control algae in ponds called "Blue Stone". We have used this in our pool for years. We buy it at our local feed and seed store. It is very cheap and is sold by the pound. (07/13/2004)

By Cynthia

Algae in Above Ground Swimming Pools

We had green algae in our pool this summer. It is real easy to treat. Use your pool brush to brush off any visible algae. Then double shock your pool. Treat with super algaecide. We have not had this problem since treating it. (07/20/2004)


Algae in Above Ground Swimming Pools

Try pool algaecide. You can get it at Bi-Mart or Fred Meyers. (05/29/2005)

By Clayton

Algae in Above Ground Swimming Pools

We used a Bioguard product called Erase. It worked wonders when all else failed. Take a water sample to be tested and see if you can find a Bioguard dealer. (07/28/2005)

By Lynne

pool algecide

I didn't find this product to be very effective at all in the dosage that is recommended. I have had same problems with green algae in above ground pool. Had water tested and was told to use *buffer* then add extra chlorine to what is recommended. Then to add extra chlorine on a regular basis. Problem has been somewhat fixed. Hope this helps a little. It was a pool dealer place in Qld that recommended this to me. (02/22/2006)

By Suz

Algae in Above Ground Swimming Pools

Types of algae

Algae in swimming pools is referred to by it color.

  • green algae - by far the most common and relatively easy to treat
  • yellow/ mustard algae - troublesome to treat, but also relatively susceptible to treatment
  • black algae - can be a nightmare to get rid of, especially in plastered pools
  • pink algae - not an algae at all, but is a fungus called Paecilomyces lilacinus that causes slimy white, pink, or grey colonies

Preventing pool algae:

Maintaining proper water balance and minimum sanitizer levels will ensure that any algae spores entering the pool water cannot take hold. Most pools use chlorine, which should be kept at a minimum level of 1.0ppm. Using the Pool Wizard or any similar mineral system may allow you to keep the free chlorine level at 0.5ppm without the risk of developing an algae problem.

Destroying pool algae:
Once algae has been allowed to bloom, it is quite tiresome to destroy. The common steps to get rid of an algae problem are:

  1. Shock treat the pool. If you are using chlorine, aim for at least 10ppm free chlorine (10 times the recommended minimum level).
  2. Circulate the water round the clock if possible.
  3. Brush the pool and vacuum.
  4. Add a commercial algaecide prepared for the algae you have (green, mustard or black) according to the instructions.
  5. Repeat brushing and vacuuming daily if possible. Add more chlorine if the level falls below 5ppm.
  6. Clean or backwash your filter regularly.

The Pool Wizard and pool algae problems:

The Pool Wizard was developed to destroy algae and bacteria, and prevent their reoccurrence in swimming pool water. The 24/7 protection the minerals claim to provide may help prevent algae and bacteria from multiplying in pool water even when chlorine levels hit zero for a couple of days. With the Pool Wizard, algae may become something you find in that health supplement you take every morning, not something you see in your pool. (08/26/2006)

By Alex xD

Algae in Above Ground Swimming Pools

Green in pools that refuses to go away:

  1. Have the water tested at your pool shop, especially for the stabilizer count/% in the water.
    If stabilizer level is high you can super shock it 3Xs the normal shock amount with nonstabilized chlorine or the best way is to add new water to the pool. Sometimes the water is just plain stale.
  2. Be sure you are shocking the pool with the proper amount of chlorine for your pool of nonstabilzed chlorine. Most pool shop people don't understand the stabilizer level and how to reach the break point.
  3. Shock the pool after a party or heavy swim use, or accidents happen.
  4. Keep testing the water, balanced pool water is less likely to have problems.
    POINT: Key is that the balancing of the water is kept up.

Pink Algae - It is the worst, it forms a shell over itself. You have to brush it each time with a hard bristle brush and hit it with PH Minus to kill it after brushing.


By Christie

Algae in Above Ground Swimming Pools

Every year when I open I have this problem. Usually I put in four times the maintenance dose of Algaecide and three times the shock amount. After three of these treatments on successive days I usually get control back of the water. Back flush frequently and vacuum the dead algae. I have a Polaris robot and it puts the dead algae back in suspension where the filter can remove it. I use a clarifier which helps to clump the algae so that the filter can take it out.

I have not done it since copper sulphate is a poison, but the most effective algaecide is nothing but a very dilute copper sulphate solution. You buy this at a tractor supply or a farm co-op, usually in 25 lb bags. Landscapers also carry it to keep algae out of ponds and fountains. You could put a small amount in a sock and suspend it in the pool. I would check the mixture concentration in the algaecide and mix my own as well. (09/07/2008)

By Daddio

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