I would think that if you used the pex type tubbing they use for geothermal and radient floor heating would be the best for heat exchange and durability. Thats why they use it. The question is if they use any antimicrobial matierials in it. I wouldnt think they would.
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Joe and Jeni
Friends don't give Friends kenya trees!
Current Tank Info: Oceanic 180 in wall, 100 sump, Geo Kalk Reactor, Tunze 9415 skimmer, Geo Media Reactors, Geo 624 CA Reactor
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