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Old 05-27-2009, 10:36 PM   #11
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Just a thought here aquazen. Take a look at that overflow you posted. I believe I see a small port on the top of the siphon "tube". I know it is not an actual tube, but it is the same principle. I believe the intent of that tube is to hook it to the suction of a pump, or the port of a power head that would otherwise be used to suck air into the powerhead for making bubbles. That way if you lose your prime when the power goes out, it (the air) will be sucked out and everything will return to normal.

I have never used this kind of overflow, but it seems to me to be a good backup strategy. Even if your overflow does not normally lose prime, it never hurts to be prepared.

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Old 05-27-2009, 10:50 PM   #12
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I saw that too, but I thought it was just for priming. Not sure how it would work if it was hooked constantly to a pump. I suppose that if the power went out and went back on, the return would start filling up the HOB overflow, and the "priming pump" would also turn back on, re-priming the overflow box.

Now the bottom line is, is it worth $50 more than the other one melosu pointed out? And how much is a priming pump? The one's on Dr. Foster's are close to $100. Definitely less expensive to just get a thin vinyl tubing to prime the old fashioned way.
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Old 05-28-2009, 12:17 AM   #13
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Do you have a power head with an air port?

You could also use something like this: http://www.marinedepot.com/ps_viewItem~IdProduct~OE1137.html

Just some options.
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Old 05-28-2009, 09:16 AM   #14
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I think I'm just going to get the CPR one with the aqualift pump. If it works well, I'll make sure to tell you guys about it (especially if it does NOT work well). Thanks for all the input.
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Old 05-28-2009, 09:41 AM   #15
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Let us know how it goes. I`m not downing the CPR. It looks like a great choice.
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