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#1
04-24-2011, 02:18 AM
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I used a CPR overflow for 10+ years on my old tank. It worked reliably. A pump is used to pull any stray air out of the top of the siphon. If air would be allowed to accumulate in the siphon, it would stop...which would be VERY bad.
That is the only job of the pump. The pump is not there to restart the siphon following a power failure. The siphon will always restart automatically as long as there is no air in the siphon.
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400 gal reef. Established April, 2007. 3 Sequence Dart, RM12-4 skimmer, 2 x OM4Ways, Yellow Tang, Maroon Clown (pair), Blonde Naso Tang, Vlamingi Tang, Foxface Rabbit, Unicorn Tang, 2 Pakistani Butterflies and a few coral gobies My Tank: http://www.canreef.com/vbulletin/showthread.php?t=28436 
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#2
04-24-2011, 07:25 AM
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I had a CPR overflow for a year or so, it really served its purpose, but I wouldn't want to use it again since there was a couple of time I woke up thinking it was raining but instead it was my tank over over flowing onto my face.
 If you are interested check out this website, super realiable and it will not cause a swimming pool in your place. http://www.lifereef.com/Extremely well built.
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Though a tree grow ever so high, the falling leaves return to the root. 300DD - 140DD  TOTM Fall 2013
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