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Old 12-19-2010, 12:05 PM   #11
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i wouldn't have the water leave the refugium down at that opening. i would have it come over the top.
the last partition before the return pump is going to render the bubble trap useless, as water comes over that and splashes down to the pump.

the 2.5" deep sand bed will not be a DSB, because it's too shallow (they need to be 4" or more), so i would save that space for some rock rubble or more macro space, and just put about 1" or so in there.
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Old 12-19-2010, 12:24 PM   #12
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I agree on that fist part of the bubble trap. You want the water going over the top, not through the middle. The last partition needs to be about 1" lower that the top of the middle section so that the water comes over the top and down the side without splashing (creating bubbles)
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Old 12-19-2010, 01:03 PM   #13
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but even if it's lower, as the water level goes down in the return area, it's still going to make new bubbles.
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Old 12-19-2010, 08:57 PM   #14
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Thanks for the input guys! I'm going to draw up a couple new versions tomorrow morning. I am going to do this one posted for a friend and then work on another 20g design for myself that has the skimmer sitting inside of it.

So basically I need to ditch the lower exit of the fuge and make it so the exit is over the baffle going into the chamber for the return?

Should I move the bubble trap to right after the 1st chamber to get rid of the bubbles before the skimmer pump and fuge get them? Then the last baffle will just be a plain baffle with the fuge overflowing it into the return pump area.

I don't think the filters are going anywhere. I'm pretty sure that's a feature they want. I don't plan on using them in my setup. I think I'm going to use a HOB filter on the sump if need be.
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Old 12-19-2010, 09:42 PM   #15
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i like the bubble trap at the end. the way i make mine, i only put 2 partitions for the bubble trap- the first is solid from the bottom up, and the second has the gap at the bottom. the idea is, the bubbles go over the first partition and head down to go under the second partition, about half way, where they do an about face and rise back up, not making it to the return area.
i always found if i had the water come over a last partition, bubbles would form as the water came crashing down there. especially when the water level was a bit low.

nice and simple, like this 40 breeder-


or this 55 gallon-



besides maybe a filter sock, i agree completely about the eggcrate filter pad levels. any carbon or GFO could be implemented via HOB reactors, and i would not want to deal with multiple filter pads like that. .
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Old 12-19-2010, 10:04 PM   #16
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Is it ok to have bubbles getting into the fuge?
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Old 12-20-2010, 08:27 AM   #17
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yes.
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Old 12-20-2010, 10:31 AM   #18
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Hmmm, Doug. I have my ATO float valve in the last chamber, and therefore never have a bubble problem for the return pump (unless I forget to fill the ATO container).
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Old 12-20-2010, 10:40 AM   #19
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Do you guys run a canopy on your sump or on your tank itself to help with evaporation?
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Old 12-20-2010, 11:29 AM   #20
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Ok here are some updated drawings. A-1 is the tank for my friend and B-1 is the tank I'm building for myself. The last chamber is pretty small for the return pump, do you think I'll have some issues with it evaporating too quickly? That last chamber is capable of holding about 2.26 gallons of water.

Call me too concerned here but I was thinking about issues that "could" go wrong. If my drain line plugs up for some reason my return pump is going to keep pumping of course. If that last chamber can hold a max of 2.25g as long as my display tank can hold that much more in it I shouldn't have to worry about overflows or anything right? A burned up return pump perhaps but that's it? Same with the return, if for some reason my return pump goes out my sump should be able to hold whatever can overflow from the display tank right?
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