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jpiotrowski View Drop Down
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Joined: September 30 2004
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    Posted: August 07 2006 at 10:23am

I am debating whether or not to build my own HOB overflow for my 20 gallon frag tank into a ten gallon (semi-exotic) macro tank.  The idea is to add more volume to the frag tank.  Due to excessive heat (I don't have central air or swamp cooler) the temp on the tank exceeded 84 degrees!  By the time I noticed the tank was in bad shape, luckily only one coral may die as the rest started coloring up 24 hours after adding cold then frozen top off.

I plan to put the overflow on the short side of a standard 20 gallon so it does need to be narrow (sorry not sure of the dimension).  I looked up some overflow plans but didn't like any I saw. 
 
Some questions:
1)  Acrylic vs. plexiglass:  Does it matter for a small semi-temporary (1 year) setup?
2)  There is a lot of construction in the area and the power is shut off frequently...what is the best way to prevent breaking the syphon or to create one?
3) Related to 2) can the Neptune be setup to turn on an A10 for ten minutes if the power goes out?  I know it will let you know when there was a outage, but can it turn on a pump when the power comes back on?
4) What is the best/most economical/(most important (safe) gaulk/sealant?
 
Those that have an overflow setup like this please give me your opinions especially if you have one on whether or not to build my own.
Thanks,
John
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Mike Savage View Drop Down
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Points: 19173 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike Savage Quote  Post ReplyReply Direct Link To This Post Posted: August 07 2006 at 10:37am
John, you might want to check out this link. It shows how to build an overflow that will self start again after a power outage. Also Plexiglass is a brand name for acrylic so they are the same.
 
 
Mike


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jpiotrowski View Drop Down
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Mike,
Thanks I saw this one but didn't read the whole thing. 
John
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pickensw View Drop Down
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John

 

I have a weir overflow. It came with the tank I picked up. It has a conection point on the top channel that you conect a standard air line to. The problem I had was that during a power outage or after several days it would loose suction. I saw on the net that you could hook up this air line to a powerhead and have it suck out the air but that put micro bubbles in the tank. So what I did was put a large powerhead in my return section of my sump and attached the air line. The powerhead needs to be at the surface(or larger powerhead) because of the heights of the overflow(3'-4'). When I have a poweroutage the back flow into the sump breaks the syphon in the overflow so no worries about flooding  thru the air line. When power is restored the the powerhead starts sucking air again. Any question I can send pics If you want. My email is [email protected]

 

Will
All things can be cured by salt water, whether by sweat, tears or going to sea.

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jpiotrowski View Drop Down
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Points: 923 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jpiotrowski Quote  Post ReplyReply Direct Link To This Post Posted: August 07 2006 at 2:19pm

Will,

Thanks for the input yes, please send pics to
My tanks will be set up side by side, so no real worries about flooding except of course if the syphon is broken and the pump continues to run.  Since it will be a small pump I don't think there will be too much of an issue with microbubbles, but who knows?
I might have questions after I see the pics.
Thanks,
John
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pickensw View Drop Down
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ok...give me about an hour.....

Edited by pickensw - August 07 2006 at 2:29pm
All things can be cured by salt water, whether by sweat, tears or going to sea.

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jpiotrowski View Drop Down
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No rush
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pickensw View Drop Down
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E-mail sent ...dang off by 10 min....

Edited by pickensw - August 07 2006 at 3:40pm
All things can be cured by salt water, whether by sweat, tears or going to sea.

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