Wow - great tip Travis. Especially when looking at the costs of the 72mm expodisc.. 
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July 2005 TOTM: http://www.reefcentral.com/forums/showthread.php?s=&threadid=622913
Current Tank Info: Spec: 7.5'x4' in the wall tank, with SPS and LPS. 8'x2' refugium. Water volume 1000gal approx.
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