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Algae are a very simple type of plant, and like all plants they need water, food, and sunlight. There are different types, the most common being one of the varieties of green, but there is also yellow "mustard" algae, and the dreaded "black" algae which is hard to get rid of. Chlorine, Bromine, or an alternative like Baquacil is added to a pool to make it a hostile environment for algae and bacteria. If the chemical composition of the water is kept properly, algae shouldn't be able to grow in a pool. However, if the chemical level drops too far, algae can grow. They feed on phosphates and other trace chemicals in the water, and use the energy from sunlight to "power" their food-making process. One way that algae can get a "jump-start" is if there is organic debris in the pool like leaves, grass clippings, flower petals, etc. This organic debris is a prime source of fresh algae spores, and it will also react with the chlorine or other purifying chemical in the water, in effect using it up, causing the chemical levels to drop. To avoid this double-whammy, daily get organic debris out of the pool and skimmer baskets. If you have an algae problem in your pool, see your local pool store for chemicals to "shock" the pool by boosting the chlorine content briefly, an algaecide for the specific type of algae you have, and a treatment to remove the phosphates from the water to prevent future algae growth.

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16y ago
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13y ago

Hot sun exposure and bacteria in the water form heavy use will do this. Shock with chlorine shock and filter and it will clear up.

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Q: What is the cause of green algae in pool?
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Related questions

What would cause a pool to be green?

Algae


How do you stop a pool from going green?

When a pool turns green, the cause is the build up of algae. To remove the algae, chemicals will need to be bought to restore the PH levels in the pool, killing the algae.


Can a solor pool cover cause green water?

I am not sure why this has not been answered. The most common reason for the green is algae growth. If you put on a solar cover and ignore pool maintenance, then the algae will grow as the water heats and when you remove the cover, the pool will be green


Why does your pool smell of algae?

cause of the algae in your pool! c.s.


How do you get the green out of your pool?

By killing the green algae with an algaecide available at your pool shop.


Pool sand filter is making your pool green?

The sand filter wont make a pool green this happens a s a result of algae.


Why is your pool green with no sign of algae?

Trees above reflecting the pool.


What is the most common method of treating green algae in a pool?

Pool Shock


When pool starts to turn green is it algae or moss?

algae. you need a sanitizer to keep it from growing!


Why the pool water is green but all parameters are ok?

The pool water is green because of algae- which is a type of plant. You just need to add more chlorine to kill off the algae...


How do you get rid of really green water in above ground pool?

Green pool water is caused by algae. To remove the algae, bring the pH level of the water to 7.8, scrub the sides and bottom of the pool, shock the water with chlorine, then vacuum up all the dead algae.


What would cause a pool to stay green and foggy?

Algae will develop in untreated water turning the water green and or foggy. If it is a swimming pool, and you don't mind, it can be treated with chemicals that you can get at the big box hardware stores or a pool supply place. If the pool is for fish you can use a biological filter and pump system.