[Coral-List] Suitable underwater materials for interpretive trail

[Ulf Erlingsson]

Rudy,

To resist bioaccumulation it has to be toxic. The only clear  
antifouling paint that works is Clear25 or similar, using TBT. As you  
know they are prohibited since many years.

When I invented the SediMeter (http://lindorm.com) Clear25 was legal,  
now it is not, so I have had to develop a cleaner instead since the  
sensor consists of transparent plastic.

You can use polycarbonate, but you must clean it regularly, such as  
at least once a week in Key West. Probably once every 2 days in the  
summer. Unless you can deploy some wave-activated cleaner, which may  
be a possibility. Strips of clear plastic hanging so that they are  
moved over the surface by the waves might work - but they might also  
be a nuisance for the reader of the sign.

Ulf Erlingsson

On 2010-11-27, at 22:51, Rudy Bonn wrote:

> Dear Listers:  Does anyone have any experience with putting  
> together interpretive materials for use underwater, close to shore,  
> 8' max depth, salinty constant.  Im looking for something that will  
> resist erosion to a point and that will also resist  
> bioaccumulation, and there will be regular maintenance.  I was  
> thinking fiberglass sheets, embedded in some sort of clear matrix,  
> or plastic, or something. Folks nust have the ability to read the  
> signage, any suggestions?  Nothing toxic!  Thanks
> Ill even put one together about the pros and cons of ACG, or is it  
> climate alteration now?  I get confused!
>
>
> Rudy S Bonn
> Director of Marine Projects
> Reef Relief
> 631 Greene Street
> Key West, FL 33040
> 305-294-3100
>
>
>
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