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Re: heating cable sources



Arizona Aquatics carries a different kind of substrate heating system 
that appears plausible. It uses a powerhead to push conventionally 
warmed tank water through tubing that runs under the substrate. See 
their substrate page. Does anyone have experience with it?

John Caddy
Self Expressing Earth (SEE)
<http://cgee.hamline.edu/see>

John Caddy
Self Expressing Earth (SEE) <http://cgee.hamline.edu/see>
Center for Global Environmental Education
Hamline University