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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I am a bit confused about your concern about leakage and moving heavy media. The two main approaches to natural pools use either a ‘wetland’ that water is circulated through or a biofilter. The biofilter is completely separate from the pool and is basically a large box full of media (gravel, sand, foam). It does require maintenance but typically does not need the media removed.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>A wetland is a real pond that forms part of the flow system from the pool. That can be a ‘stream’ effect but basically utilizes pipes and pumps. Again it is a distinct area.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> greenbuilding-bounces@lists.bioenergylists.org [mailto:greenbuilding-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Gennaro Brooks-Church - Eco Brooklyn<br><b>Sent:</b> June-07-12 5:57 AM<br><b>To:</b> Green Building<br><b>Subject:</b> Re: [Greenbuilding] surface area<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Foam would be a great colonizer but I want to stay away from synthetics given that it is a long term swimming pool and I don't want to worry about leeching.<o:p></o:p></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><br clear=all>Gennaro Brooks-Church<br>Director, Eco Brooklyn Inc.<br>Cell: 1 347 244 3016 USA<br><a href="http://www.EcoBrooklyn.com" target="_blank">www.EcoBrooklyn.com</a><br>22 2nd St; Brooklyn, NY 11231<br><br><br><o:p></o:p></p><div><p class=MsoNormal>On Wed, Jun 6, 2012 at 11:51 PM, John Salmen <<a href="mailto:terrain@shaw.ca" target="_blank">terrain@shaw.ca</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Your talking about a biofilter and foam chips have been used successfully for that in all types of wastewater treatment for maintaining a ‘smutzdecke’ (waterloo biofilter is one example) though typically it is graded sand and gravel. Netted bags of foam chips with some kind of ballast might work well. Lots of research out there.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Best</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>John</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:greenbuilding-bounces@lists.bioenergylists.org" target="_blank">greenbuilding-bounces@lists.bioenergylists.org</a> [mailto:<a href="mailto:greenbuilding-bounces@lists.bioenergylists.org" target="_blank">greenbuilding-bounces@lists.bioenergylists.org</a>] <b>On Behalf Of </b>Gennaro Brooks-Church - Eco Brooklyn<br><b>Sent:</b> June-06-12 8:03 PM<br><b>To:</b> listserv Green Building new<br><b>Subject:</b> [Greenbuilding] surface area</span><o:p></o:p></p></div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I am building a natural pool and could use some insight into the media used in the regenerative zone.<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Typically gravel is used since it creates large surface area for microbes and lasts.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Ideally I would prefer something lighter so it can be more easily removed when the pool leaks.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I considered crushed brick but dust could be an issue.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I salvaged some Spanish S tile I could put in and cover with gravel. I wouldn't break it I would just put it in the way it comes stacked on the pallet. Any thoughts on how that would compare to gravel in terms of surface area? Keep in mind that microbe surface area is different than surface area we can see.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Using safety netting from job sites would have amazing surface area but I am not interested in the leeching possibilities.<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Any thoughts?<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><br clear=all>Gennaro Brooks-Church<br>Director, Eco Brooklyn Inc.<br>Cell: <a href="tel:1%20347%20244%203016" target="_blank">1 347 244 3016</a> USA<br><a href="http://www.EcoBrooklyn.com" target="_blank">www.EcoBrooklyn.com</a><br>22 2nd St; Brooklyn, NY 11231<o:p></o:p></p></div></div></div></div></div><p class=MsoNormal><br>_______________________________________________<br>Greenbuilding mailing list<br>to Send a Message to the list, use the email address<br><a href="mailto:Greenbuilding@bioenergylists.org">Greenbuilding@bioenergylists.org</a><br><br>to UNSUBSCRIBE or Change your List Settings use the web page<br><a href="http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org</a><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>