Something like this should be perfect then... drill a hole through the conduit and have a nut on each side.
http://t0.gstatic.com/images?q=tbn:A...YnrDeowGnqb3Ay
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Current Tank Info: 120 Gal Rimless Starphire, ATB 840 v2.0 Skimmer, reefledlights.com DIY LED's, 2 Tunze 6105's, 40B sump.
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