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What else can you do if you have a very dirty above-ground 21-foot pool and you've vacuumed it scrubbed the sides and shocked it several times but the water is still cloudy and greenish in color?

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First, take a sample of the water to your local pool dealer. It could be that your algaecide isn't a high enough strength. You may have to add it and run you filter for 12 hrs X 3 days. Change your sand in your sand filter.
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If there is brown or mustard-colored stuff at the bottom of your pool and you've tried to vacuum it but it is still there is there anything you can put in the pool to get rid of it?

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What can you do if you have shocked your Intex above-ground pool several times but your water is still green?

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When using sink and sweep for pools will your water still be cloudy until you vacuum it?

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If you have shocked added soda algaecide and clarifier to an 18x36 inground pool and my water is still cloudy and light green what now?

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Why is the swimming pool water cloudy and greenish?

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