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Unread 06/21/2017, 07:13 PM   #1
erik921
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Anyone ever tried making a full height, curved overflow like this?

I'm looking at making a custom tank and I want the tank to be as close to the wall as possible, with no visible pipes in the back - so I'm opting for an in-tank overflow.

Tank will be visible on 3 sides, so leaning away from corner overflow.

And I was think it might be nice to avoid any obvious sharp edge or non organic shape where the overflow meets the wall. Led me to a design something like this in the images attached. Anyone ever do a tank like this?

Currently leaning towards a bean animal with 3/4" bulkheads for the siphon and Durso and 1" for the emergency overflow and return. Tanks is only ~60 gallons and don't plan super fast flow throw the sump so figure smaller bulkheads on the ends helps the curve of the back be smaller.

Are there any lower profile bulkheads out there that would help make the overflow even volume smaller? Hate to waste anymore tank volume than I have to...


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Unread 06/21/2017, 07:28 PM   #2
jda
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I have seen it, but only in acrylic... maybe glass won't do that.


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Unread 06/21/2017, 07:31 PM   #3
erik921
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Yeah I was wondering about that...I suppose the overflow could be acrylic. I mainly care about the visible sides being glass for durability/scratching etc.


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Unread 06/22/2017, 02:02 AM   #4
flores.m88
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Question what do you use for these design sketches?


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Unread 06/22/2017, 02:03 AM   #5
flores.m88
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Oh and my neighbors tank has one, I'll ask
More questions and take pics once I'm home from camping.


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Unread 06/22/2017, 05:24 AM   #6
Ron Reefman
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I don't see any reason that wouldn't work.

The one issue I see is that the ends get very narrow and 'stuff' will develop and grow there. And it could be difficult to clean out. But if you aren't an obsessive-compulsive about spotlessly clean tanks, it shouldn't be a problem.


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Unread 06/22/2017, 08:16 AM   #7
erik921
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Quote:
Originally Posted by flores.m88 View Post
Question what do you use for these design sketches?
I use Siemens NX (what we use at my work). I think it's a little bit obscure as far as CAD package go...


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Unread 06/22/2017, 08:18 AM   #8
erik921
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Quote:
Originally Posted by flores.m88 View Post
Oh and my neighbors tank has one, I'll ask
More questions and take pics once I'm home from camping.
Thanks, that would be great! I'm curious to know how it looks in real life.


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Unread 06/22/2017, 11:59 AM   #9
FireReeferSteve
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Have never seen one but would be cool!


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Unread 06/22/2017, 11:59 AM   #10
windlasher
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I would make sure that there is enough room back there to get you hand down there and or fish things out clean. If you get a jumper in there, it's going to be hell getting him out without disassembling a lot of your plumbing.


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Unread 06/22/2017, 12:04 PM   #11
BigDave
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why not do just a normal 'center' overflow? that gives you room on both sides for more rock and coral.


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Unread 06/22/2017, 03:30 PM   #12
erik921
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Quote:
Originally Posted by BigDave View Post
why not do just a normal 'center' overflow? that gives you room on both sides for more rock and coral.


I was trying to avoid having sharp corners where the overflow meets the back wall to minimize the attention drawn to it. I figured if I could make the bulge low enough profile it would be worth it...

Also get the benefit of a much wider weir for more surface skimming.


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Unread 06/22/2017, 03:32 PM   #13
erik921
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Quote:
Originally Posted by windlasher View Post
I would make sure that there is enough room back there to get you hand down there and or fish things out clean. If you get a jumper in there, it's going to be hell getting him out without disassembling a lot of your plumbing.


That's a really good point. I wasn't necessarily going to put a cover over the tank. Maybe I need a cover over the overflow area at the very least to keep things from getting in there. I'm trying to squeeze it down as small as possible so getting a fish out of there would be really tough like you said


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Unread 06/22/2017, 03:33 PM   #14
BigDave
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I can see that, but if the back glass is painted black and so is the overflow, then it pretty much disappears. I have a corner overflow on a three sided tank and no one has ever even looked at it.

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Unread 07/20/2017, 08:08 PM   #15
erik921
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BigDave - it looks like your overflow is just in the upper corner. You're right it certainly isn't very visible.

I worry that it will be a little distracting in the center of my tank. Particularly with the "two island" aquascape I intend to do.

That said - I'm considering both options in the image below. One problem I've run into though is that I cannot find a manufacture that can make the overflow from glass (ideally black glass).

I'd like a glass overflow for two reasons:
1) more durable for cleaning etc.
2) much better adhesion to glass and sealing. As this will be the surface keeping my whole tank from draining onto the floor in the event of a bulkhead failure, I'd like the material and bond to be as strong as possible.

Can anyone recommend a custom tank manufacturer for this?


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