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Old 10-07-2006, 09:56 AM   #1
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DIY closed loop circuit with Calfo-style return manifold ...

I've got a AGA 125 gallon that I'm setting up as a reef, I bought a cheap glass drill bit on eBay (about $9, including shipping), drilled two 1.5" holes, plumbed them together to the input to a Barracuda pump, and have the output going to a Calfo-style output manifold over the tank, works great. I'm using 10 loc-line nozzles as the output of the manifold. Thought I'd give people a look...

Diagram of the CL circuit (doesn't show the separate overflow/sump/fuge circuit):



The back of the tank, after drilling, and painting black:


Plumbing in the back (you can't see the pump, it's in the lower left hand corner):


The return manifold:


The manifold, on the tank:




'Running' pics (no, that's not my final aquascaping! .

With flash:


Without flash:


The only trouble I had with this is that the Barracude is a bit too powerful, it was blowing my substrate around a lot. So I just restricted the output with the ball valve. Per the manufacturer, that won't hurt the pump, and will actually save electricty. If I had to do it again, I'd get the Reeflo Dart, a 3600 gph pump, rather than the Barracuda, a 4500 gph pump.
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Old 10-07-2006, 09:59 AM   #2
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You did a FANTASTIC job..thanks for sharing.
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Old 10-07-2006, 10:47 AM   #3
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pretty slick!

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Old 10-07-2006, 10:51 AM   #4
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That was very informative and great Job. I`m impressed.
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Old 10-07-2006, 11:57 AM   #5
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Sweet that's the same tank that I have. Where did you buy those overflows? or did the come with the tank. I was just going to build some overflows out of acrylic but I'd rather buy them for looks/strenth/reliability.
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Old 10-07-2006, 12:05 PM   #6
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Wow...very, very nice!
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Old 10-07-2006, 12:13 PM   #7
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Thanks, everyone. I had never done anything like this before, did a bunch of reading, and gave it a shot. I'm happy with the way it came out. The overflows came with the tank, it's a standard reef-ready All-Glass 125 gallon aquarium. If I ever do this again, I think I'll get a non-reef ready tank, and drill my own Calfo-style overflow. Here's a thread showing an internal overflow:

http://reefcentral.com/forums/showth...ontal+overflow

Here's a thread showing an external overflow, takes up NO space in the tank:
http://www.reefcentral.com/forums/sh...hreadid=444094
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Old 10-09-2006, 12:59 AM   #8
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Drilling your own holes is scary to me A local guy did the Calfo style CL design. He likes it as well.
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Old 10-09-2006, 02:31 AM   #9
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wouldn't the lights get damaged from the splash/evaporation?
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Old 10-09-2006, 08:04 AM   #10
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There isn't really any splash from the closed loop, so that's not that big of a concern. T5HO lights are usually placed 4 to 6 inches over the water surface, so yeah, 'normal' splash is a concern. That's why I bought the waterproof endcaps, to help with that. Some people run them bare over the water like I am, some use a shield of some sort. I had considered putting in a clear acrylic shield, but decided against it for now. I just need to wipe down the bulbs and reflectors periodically.
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