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Re: [APD] HQI's

Gordon McLellan wrote:
> optically transparent and uv absorbing ... isn't that a contradiction :-)

Na. See UV filters for photography. I could get some of this glass - 
some of it transmits 99.7% of visible light. It is very expensive 
though. Last one I bought was about $9.20 per square inch.

Jerry Baker
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Aquatic-Plants at actwin_com