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Pool not shocked strongly enough or often enough. Insufficient filtration. Run the filter 12 - 14 hours a day until clear, thereafter 10-12 hours/day. Too much debris introduced into pool. Suspend use for a day or two and have swimmers rinse their feet before entering the pool. Vacuum pool floor. Water PH and hardness may need adjustment; use test kit and adjust accordingly.

I have run into situation where the green algae was so well established that even algaecide wasn't doing a good job of clearing the water. I ended up flocking the pool this means casting Floculent over the surface of the pool which then sinks through the water to the bottom dragging impurity's with it. After a couple of days of settlement You vacuum the distinctly cloudy layer at the bottom to waste. Do not filter it.

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15y ago
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6y ago

You need to put an algicide in your water. If there is metal in the water, the metal will react with the chlorine shock and turn green or brown. Certain areas of the country have naturally high levels of metal in the groundwater, so that you will have to use a chelating agent every time top off your pool.

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13y ago

If your pool water turns green after it is shocked with chlorine, it is too basic. Algae can thrive there now and it is green. Add pool acid (it may require several gallons) and check the pH of the water frequently, adding more, if needed. If it gets too acidic, you can add some baking soda (which is basic) until you reach the desired pH - slightly below neutral. Neutral is pH7.0

answer : if you used well water you have metals in your pool take a test water sample to your pool dealer and have it checked for metals and he will advise what to do next

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15y ago

Trace amounts of copper in your water. Use a metal remover from your pool store.

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13y ago

Because electricity turnes water green.

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Q: Why does pool water turn green after shock?
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Related questions

Will over shock of pool cause it to turn green?

Not likely


Will a pool turn green after dogs swim in it?

haha, no Not just from dogs swimming in it. It can turn green because of the water being dirty. If it is your swimming pool it probably needs more chlorine or whatever you use for keeping it clean. If it is a kiddie pool just change the water.


Why would a salt water swimming pool turn blonde hair green?

It is not the salt water pool or the salt water that is turning your hair green. It is a poorly maintained pool with a chemical imbalance - pH and total alkalinity out of required parameters.


Abobe ground pool water is green?

Green pool water is caused by algae growth. When chlorine levels drop below 1-parts-per-million, algae will begin to grow. To get rid of the algae, turn on the pump so chemicals will circulate through the water. Correct the pH level of the water by adding an acid or a base to bring the pH level to a 7 or 8. Clean any debris out of the pool. With a nylon brush scrub the pool, breaking up the algae. Add shock to the pool, and continue running the pump throughout the cleaning process. The water will be cloudy when the shock is first added, but will soon begin to clear. Once the water is clear, vacuum the algae from the pool.


How do you turn a saltwater pool to a chlorine pool?

Stop adding salt to the pool and use tablets and shock when needed.


Plant watering with salt water pool water?

Watering a plant with any type of salt water will cause the plant to wilt. Because of the salt outside the plant cells, water leaves the cells in a process called osmosis. With less water in the cells, the cells shrivel up. If they shrivel up, the plant loses it's ability to hold itself up.


How much shock in a 4.000 pool?

I would not shock the pool unless you have problems like the water is getting cloudy or worse if it starts to turn green. Realistically, if nobody is urinating in the pool or unless you have extremely large bather loads shocking is not required. Before shocking make sure to test the pH and adjust it to 7.2-7.4. Then make sure there is adequate chlorine in the pool (1 -3PPM). IF you still require shock, buy a non-chlorine shock (potassium monopersulfate). For a 4,000 gallon pool, follow the directions on the product. It usually comes in a one pound packet and about a half of that bag should do it.


How long does green hair last from swimming in a pool?

Hair bleaches in the pool not because of the chlorine, but because of the metals and copper in the water. If the pool has a high concentration of metals and copper, then yes, it will appear or turn a faint green.


Why would pool water turn green with a brand new liner and new water and shock treatment?

Test your swimming pool water. ... 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. A test kit is the first step. --- There are several possible causes: under-shocking for the volume of water, or a particularly aggressive algae bloom brought on by alkaline water, or contamination of the water filter system. If there was a heavy rainfall, the algicide may have become too diluted. Usually a repeated shock, followed by proper chlorination, will remove the color, and it is important to vacuum out the dead algae. When installing a new liner, there are products that can prevent the growth of algae on the liner surface. The occurrence of "overnight" green also occurred in water polo pools at the 2016 Rio Olympics, and organizers never agreed on what might have caused it.


Why does your pool turn green now that you switched from baquacil to chlorine?

The only reason the pool would turn green would be if the Baquacil is not entirely out of the pool and it reacts with the Chlorine.


Can lightning cause your pool to turn green?

Lightning puts chemicls such as nitrogen into the water wich then basicaly becomes fetilizer for algae, helping to turn it green. However, proper chemical balance should be able to maintain your water throughout thunder storms under normal circumstances. -Worker at a pool company/pool owner


Why would county water turn green in your pool after its been clear?

maybe someone threw up in it... lol