Hi Barry,

We have run into similar situations in the past. As Fred stated, you want to make sure all moisture has escaped. Then I would use Sure Klean 600 by Prosoco. This is a strong acidic cleaner, so you'll want to make sure you neutralize after. Let dry for  3 to 7 days and then your friend can go back in and Grout


Anthony Godoy
Godoy Stoneworks and Tile Care
Www.godoystoneworks.com

On Thu, May 24, 2018, 8:30 AM Fred Hueston <fhueston@gmail.com> wrote:
First I would make sure that all the moisture has escaped.  I would than try a mild acid such as sulfamic acid in a test spot.  Its common for water to leave mineral stains behind. be careful not to let the acid dwell too long since it will compromise the surface.

On Thu, May 24, 2018 at 8:28 AM, Barry Raduta <barry@diamondstoneandtilecare.com> wrote:
Hello Partners,
Thank you in advance for helping me to discover a remedy for this situation.  I have a friend who owns a hardscaping company who installed "tabby stone" as a pool deck.  Tabby is a cast concrete with oyster shells in it.  As you can see from the photo, many of the tiles have retained water marks around the edges and will not go away.  Grout has not been installed yet.  Is there a cleaner/solution that can be used to get the stains out using a nylon brush on a floor machine.  I don't have much experience with outdoor projects.
Thanks,
Barry
---------- Forwarded message ----------
From: <stonerestorer@gmail.com>
Date: Thu, May 24, 2018 at 8:16 AM
Subject: IMG_2134.JPG
To: Barry Raduta <barry@diamondstoneandtilecare.com>







Sent from my iPhone



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Thank You,
Barry V Raduta
Diamond Stone & Tile Care-South
Stone & Tile Pros
843-540-1445


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Frederick M. Hueston
www.stoneforensics.com
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