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Old 02-19-2010, 01:07 PM   #11
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Yeah.. i thought it was acrylic. If it's acrylic then why don't you just drill it?

Also, aquacave, ebay, craigslist, and liveaquaria all have cheap overflow systems that i've seen. 30$ for overflows without pumps if you already have one. I think if the overflow comes with the pump it will be considerably more money.

Maybe not aquacave tho because this is their cheapest one, and doesn't even come with the pump

http://www.aquacave.com/detail.aspx?ID=74
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Old 02-19-2010, 03:48 PM   #12
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I guess i am just afraid to drill..haha seems so permanent. Also what do you mean by pump? What does the pump do?
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Old 02-19-2010, 07:05 PM   #13
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One thing I am worried about getting a HOB overflow on my biocube is cutting into the hood a lot and most HOB look like I would have to do so. Not sure about this as I am clueless when it comes to sumps, but would this work DIY Overflow Using Only PVC Pipe (DIY OVERFLOW PROJECTS) I found it searching for HOB overflows. O btw sorry base13 if I am stealing your thread. Just have questions and figured your biocube isn't much different than mine.
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Old 02-20-2010, 11:28 AM   #14
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Pump means the return pump. The overflows siphon water down to the sump. The pump sends the water back up to the display tank. If the overflow comes with a pump, I would imagine they are a matched set. Not really necessary to buy a set, but it takes some of the guesswork out.

The PVC overflows look like they'd work. I think you'd lose suction every time you the water level fell below the bottom of the pipe. There are other designs that won't lose suction.
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Old 02-20-2010, 01:21 PM   #15
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Well are there any pvc overflows that wouldnt lose suction that you know of? And how big of a deal is losing suction? Is it a lot of work to get back? I dont want an over flow that involves cutting more a 1" hole in the back of the biocubes hood.
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Old 02-21-2010, 12:40 AM   #16
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If you don't cut or drill you have no options. Go on youtube and look at fuge/sumps. There are several different ways, all must be cut. CPR makes one that HOB. There are a lot of factors that go into draining a tank from above to below.
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Old 02-21-2010, 01:24 AM   #17
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Whats wrong with an overflow made out of just pvc?
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Old 02-22-2010, 12:55 PM   #18
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There is nothing wrong with a PVC overflow if it's done correctly. To maintain suction, you need to keep the tank end of the U-tube submerged. Commercially available overflows use a box to hold water and keep the end of the pipe submerged.

If you only cut a 1" hole, that limits you to 1/2" pipe, which is really too small to be an effective overflow. The flowrate is just too low.

I really think you'd be best off leaving the Biocube alone. It sounds like you've caught Tank Cramp, one of the debilitating diseases common to aquarium folk. Tank Cramp usually leads to Multiple Tank Syndrome, which is incurable. Resistance is futile...give in and get more and bigger tanks.
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Old 02-23-2010, 10:29 AM   #19
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Haha if I had the chance to get it bigger or get more I would, but next year I am in a dorm for college and I unfortunatly can't. Now if I did cut a hole big enough for 3/4" or 1" PVC it would be worth it...haha
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