cleaning pool grout

delisiv

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Mar 28, 2016
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crystal
#1
I have a soaking size pool, outdoor, that has yellowed/orangeish staining on the grout above the water line. It was like this when we bought the house last year. How can I clean it off?
 

duraleigh

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Apr 1, 2007
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#2
Welcome to the forum. :wave:

Try a 3:1 solution water and muriatic acid (3 waters).

It should foam up on contact, wear gloves, and scrub with a deck brush. Rinse quickly.

I assume you have already tried an abrasive like Ajax and water, right?
 

DaninFLA

Well-known member
Apr 29, 2015
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Sarasota, FL
#3
Welcome to the forum. :wave:

Try a 3:1 solution water and muriatic acid (3 waters).

It should foam up on contact, wear gloves, and scrub with a deck brush. Rinse quickly.

I assume you have already tried an abrasive like Ajax and water, right?
well, i will second the part where you say "rinse quickly". muriatic acid is going to eat up the grout, cant leave it on long. I use a 50/50 of diluted bleach and spray it on and let it sit until it dries, and then rinse and scrub with a nylon brush and works great.
 

duraleigh

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#4
The "yellowish/orange staining" that OP described didn't sound like algae, which chlorine will remove very, very well.

It sound like calcium buildup which will require some form of acid to remove.

A pic always helps