the blue line is most likely caused by the chemicals used in the pool. you will have to try several different approaches to see which one works. The Problem is the chemicals you use may upset the chemical balance of the pool water.  I would first try a mild abrasive to see if it can be abraded off with out the use of chemicals. If that doesnt work than I would try a mild acid such as sulfamic acid and than an alkaline. Make sure to test first to see what it does to the tile.<br>
<br><div class="gmail_quote">On Tue, Jul 19, 2011 at 11:40 AM, Stuart Young <span dir="ltr">&lt;<a target="_top" href="mailto:santafefc@sbcglobal.net">santafefc@sbcglobal.net</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<u></u>





<div bgcolor="#ffffff">
<div><font size="2" face="Arial">Gentlemen,</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">A swimming pool, at surface level has a 6&quot; glass mosaic 
tile all the way around.  The surface below the tile is called pebbletech, 
a well known finish for interiors of pools.  The pebbletech seems to be 
causing a blue line on the mosaic tile.  How do I remove it?</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">Stuart Young</font></div>
<div><font face="Arial">Santa Fe Floor Care</font></div>
<blockquote style="border-left:#000000 2px solid;padding-left:5px;padding-right:0px;margin-left:5px;margin-right:0px" dir="ltr">
  <div style="font:10pt arial">----- Original Message ----- </div>
  <div style="font:10pt arial;background:#e4e4e4"><b>From:</b> 
  <a title="bairdstandish@gmail.com" href="mailto:bairdstandish@gmail.com" target="_blank">Baird 
  Standish</a> </div>
  <div style="font:10pt arial"><b>To:</b> <a title="sccpartners@stoneandtilepros.com" href="mailto:sccpartners@stoneandtilepros.com" target="_blank">Restoration and Maintenance</a> 
  </div>
  <div style="font:10pt arial"><b>Sent:</b> Tuesday, July 19, 2011 7:50 
AM</div>
  <div style="font:10pt arial"><b>Subject:</b> [sccpartners] Table Etch - What 
  is this Material?</div>
  <div><br></div>Hi,
  <div>I have been asked to take care of some etching on a table.  The site 
  is fur peace from here so I asked that they send me a picture.  In 
  looking at the picture, I am not really sure what this material is.  Is 
  it Quartzite?  And does anyone know how this might respond to honing and 
  polishing  Thanks for your help.</div>
  <div>Baird</div>
  <div><img title="table2-1.JPG" alt="table2-1.JPG" src="/sccpartners/cache/1463773/2.JPG" width="420" height="315"><br clear="all"><br>-- <br>________________________________________<br>From the desk 
  of<br>Baird Standish<br>Managing Partner<br>Facility Specialists, LLC<br>1616 
  Walnut St.<br>Philadelphia, PA 19103<br>Phone: <a target="_top" href="tel:215-732-7505" value="+12157327505" target="_blank">215-732-7505</a><br>Fax: 
  <a target="_top" href="tel:215-546-9160" value="+12155469160" target="_blank">215-546-9160</a><br></div>
  <hr>

  <p>Powered by <a target="_top" href="http://www.discussthis.com" target="_blank">http://DiscussThis.com</a> 
  <br><a target="_top" href="http://www.discussthis.com/members/sccpartners@stoneandtilepros.com" target="_blank">Visit 
  list archives, subscribe, unsubscribe or change your subscription preferences 
  </a><br><a target="_top" href="mailto:sccpartners@stoneandtilepros.com" target="_blank">Start a new 
  conversation (thread)</a> </p></blockquote><hr>
<p>Powered by <a target="_top" href="http://www.discussthis.com" target="_blank">http://DiscussThis.com</a>
<br><a target="_top" href="http://www.discussthis.com/members/sccpartners@stoneandtilepros.com" target="_blank">
Visit list archives, subscribe, unsubscribe or change your subscription preferences
</a>
<br>
<a target="_top" href="mailto:sccpartners@stoneandtilepros.com" target="_blank">Start a new conversation (thread)</a>
</p>
</div>
</blockquote></div><br><br clear="all"><br>-- <br>Frederick M. Hueston PhD<br><a target="_top" href="http://www.stoneforensics.com" target="_blank">www.stoneforensics.com</a><br><a target="_top" href="http://www.stoneandtilepros.com" target="_blank">www.stoneandtilepros.com</a><br>
Recommended stone care products  <a target="_top" href="http://www.stonecarecentral.com/?Click=2149" target="_blank">http://www.stonecarecentral.com</a><br><br><div>Many of my articles can be found at <a target="_top" href="http://www.stoneandtilepros.com" target="_blank">www.stoneandtilepros.com</a></div>
<div>Listen to my radio show   <a target="_top" href="http://www.blogtalkradio.com/drfred" target="_blank">www.blogtalkradio.com/drfred</a></div><div>office             321 514 6845      </div><div>See my specialty products at  <a target="_top" href="http://www.godrfred.com" target="_blank">www.godrfred.com</a></div>
<br>