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Old 01-15-2017, 09:43 AM   #1
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How to remove water stain on concrete pool deck


First time in the past year, I noticed the water stain on my pool deck due to sprinkler overspray. Not sure if well water chemistry changed last year or some other reasons. I am asking for suggestion how to get rid of these stains.

Thanks.
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Old 01-15-2017, 09:57 AM   #2
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Re: How to remove water stain on concrete pool deck


TSP mixed in a bucket of water, and a stiff scrub brush.

That is probably caused by over fertilization of the grass, and runoff from the slope.

TSP = Tri-Sodium Phosphate.


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Old 01-15-2017, 09:59 AM   #3
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Re: How to remove water stain on concrete pool deck


Wow, yes. I do have drainage issue here. During the water, the run off will stay here for a while since the ground is frozen. but if you look at the top left with darker spot, that was caused by sprinkler overspray.
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Old 01-15-2017, 10:02 AM   #4
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Re: How to remove water stain on concrete pool deck


If there is a possibility the stain is from well water, in a most inconspicuous location try muratic acid on a small area.
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Old 01-15-2017, 10:06 AM   #5
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Re: How to remove water stain on concrete pool deck


What ever the cause, TSP will clean it.

Adjust the sprinkler to not spray there.

Not being on-site to inspect this better, it still looks sloped to me.
And I have seen runoff carry the fertilizers to areas and stain very much like your spot.


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Old 01-15-2017, 10:10 AM   #6
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Re: How to remove water stain on concrete pool deck


So will TSP hurts the grass
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Old 01-15-2017, 10:18 AM   #7
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Re: How to remove water stain on concrete pool deck


Every cleaner will hurt the grass a bit.

The secret is to not get it on the grass, and don't rinse it into the grass.

ED
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Old 01-15-2017, 10:42 AM   #8
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Re: How to remove water stain on concrete pool deck


Thanks. I will be very cautious. With the slope there, it is hard not to get water onto grass
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Old 01-15-2017, 11:06 AM   #9
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Re: How to remove water stain on concrete pool deck


Two buckets, one with the TSP mixture, one with clear water and a sponge to rinse and remove the cleaner.

Remember the stiff scrub brush.


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Old 01-15-2017, 07:39 PM   #10
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Re: How to remove water stain on concrete pool deck


just looks dirty to me. i would power wash it.
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