Discoloration of Grout Below Water Line

[chrisg7]

I’ve been noticing a discoloration of the grout around my pool just below the water line between tiles. I’m pretty consistent at keeping the chemicals at the right level and so I wasn’t sure what it might be. The tile was redone only about a year ago, so I’ve been a little disappointing it’s already showing discoloration. But maybe there’s a certain chemical I need to use more of or less of to fix the problem?

Any advice is appreciated!

Thanks!
Chris

 

[ajw22]

Wet surfaces always look different then dry surfaces.

Let your water level drop a bit and see if a “discolored” area looks different when it dries out.

I don’t see a problem. The grout underwater looks a bit darker.

Do you brush the pool and tile and grout regularly?

Post a current complete set of water chemistry tests in your PoolMath log.

No, there is not a simple chemical to add.

 

[chrisg7]

Wet surfaces always look different then dry surfaces.

Let your water level drop a bit and see if a “discolored” area looks different when it dries out.

I don’t see a problem. The grout underwater looks a bit darker.

Do you brush the pool and tile and grout regularly?

Post a current complete set of water chemistry tests in your PoolMath log.

No, there is not a simple chemical to add.

The grout is brown. That’s what alerted me. Yes, I brush once a week including tile.

 

[Mdragger88]

Looking closer I can see the difference in color (brownish vs grey)
How are you currently chlorinating? (Tabs/liquid chlorine/cal hypo)
Are you on a well?
Current Test results would be helpful
Fc
Cc
Ph
Ta
Ch
Cya
You can also try some of these methods to help id your stains/determine if it is actually staining

Stains in Your Pool

The stained pool is beyond embarrassing. Our in-depth Guide to remove stains in your pool will help you to remove the stains and prevent them in the future.

www.troublefreepool.com

 

[chrisg7]

Looking closer I can see the difference in color (brownish vs grey)
How are you currently chlorinating? (Tabs/liquid chlorine/cal hypo)
Are you on a well?
Current Test results would be helpful
Fc
Cc
Ph
Ta
Ch
Cya
You can also try some of these methods to help id your stains/determine if it is actually staining

Stains in Your Pool

The stained pool is beyond embarrassing. Our in-depth Guide to remove stains in your pool will help you to remove the stains and prevent them in the future.

www.troublefreepool.com

Thanks for your help!

I currently use liquid chlorine.

I’m not on a well.

I just uploaded a new set of chemical logs.

Let me know what you think — thanks so much!!

Chris

 

[Mdragger88]

Cya is a bit low - How are you measuring a cya of 10?
ta is a dab low too but I doubt that’s the cause of the issue. Still wanna correct those.
Bring ta up to 60 with baking soda before adding any cya as its acidic and will lower ph/ta.
What test kit do you have?

City water can have iron in it as well.
Have you tried any of the tests in the article?