Correct return??

[Hook]

I have a 75 AGA aquarium with the built in overflow. I am planning on using a Durso standpipe, and I was wondering if a mag12 (1200gph) would be too much for a return pump. I already have one of these pumps, and I would like to use it...somewhere. If I can't I guess I'll have to get a different pump. I am still in the planning/buying phase and I have not yet figured out how big my sump will be (because I know everyone will probably ask).

My lighting is going to be Icecap 660 VHO actinics, with 2-250 Icecap MH. Not sure exactly what bulb color yet, maybe HQI if they get that flicker thing figured out...Not that that has anything to do with this post, but I am so proud of myself for finally making up my mind on lighting!![img]/ubb/biggrin.gif[/img] :8

Thanks for replies!!

~~~Hook

[Personifer]

Does the overflow have a 1 inch drain and a 3/4 inch return?
With a 1 inch drain your pump will work fine. There should be no need for a new pump.

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Jeff

http://www.homestead.com/jeffsreef/index1.html

[Bamm Bamm]

1" drains are only capable of handling 600gph thats why I have to get a double overflow for my 90..I also have a mag 1200 for a return..If you had like say a 1.5" or 2" bulkhead you would be ok otherwise the pump will be way to much..Dan

[JG]

FWIW, I use a Mag12 on my 58 Oceanic for a return pump. I have 1" bulkhead, and it handles it no problem at all

[Personifer]

Bamm Bamm are you sure about that flow? I thought 1 inch would flow around 800 gph+. I thought someone told me it was a 1000gph. I really don't know for sure. I have 2 1 inch drains on my 155 gallon and use a Mag 2400 for the return pump. It works out great. You could also put a ball or gate valve on the pump to restrict the flow but I don't think you'll need to.

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Jeff

http://www.homestead.com/jeffsreef/index1.html

[Brien]

Bamm Bamm,

I have contemplating ordering fron Interamerican "Ninong special" 48"L x 26"H x 28"D 151 gal. ? 231 is the correct
conversion factor isn't it?

I would like to keep mostly sps corals.

The question I have is in regards to overflows with durso stand pipe. I would like to have my total tank circulation handled by overflows without PHs (for asthetic reasons).

Is the rate limiting step for flow out the tank in general the diameter of the outflow hole, vs total length of the overflow grating?

I would like to plumb this into a sump refugium (yet to be designed) with some limitation to the refugium flow. Return would be plumbed back into overflow (like Ninongs) and dispersed with seaswirls (? number).

I thinking I need 2 corner overflows?

Help me out here because I have no idea what I'm talking about.

Any response appreciated.

Thanks
Brien

[Personifer]

I'm not Bamm Bamm nor have I ever played him on TV.

Is the rate limiting step for flow out the tank in general the diameter of the outflow hole, vs total length of the overflow grating?

Yes, and also how many bends in the pipe. I have one drain going straight down into my sump. The other drain I have a 90 degree elbow taking it over to the other side and another 90 degree elbow so it drops in the sump. Obviously it doesn't have as much flow as the one going straight in.

I thinking I need 2 corner overflows?

That would be the best way to go. If you want to keep sps the more water flow the better.


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Jeff

http://www.homestead.com/jeffsreef/index1.html

[This message has been edited by Personifer (edited 02-13-2001).]

[This message has been edited by Personifer (edited 02-13-2001).]

[This message has been edited by Personifer (edited 02-14-2001).]

[Brien]

What are the flow rates for different diameters. I'm thinking 1500-2000 gph total.

Thanks

Brien

[Bamm Bamm]

600gph is just what everyone told me on these boards...When I was gonna drill my 90 everyone said that one 1" bulkhead would in no way handle the 1200 gph mag12 do thats why I say this... Lifereef's I believe the one I had had a 1.25"bulkhead and it was rated at 700gph It might of only been a 1" but pretty sure it was a 1.25"...SO I dunno Of course I could be worng that just what all my research has shown to me..I haven't until now heard of one 1" bulkhead handl;ing a mag1200..urious what the corrected gph on iyt is like how much head you have on it and such how many 90degree bends..iam gonna try to set mine up so I don't need very many powerheads also..My sump should be all setup and installed next week..Just waiting to get my overflow...Dan

Reefland is building me a double overflow which use dual 1.25" drain hoses into the sump then Iam gonna plumb the return up with 1" and then reduce to 3/4"..Dan

[Schottman]

drain rates depend greatly on how many bends or if there is a straight shot in the drain line. I have read that with a durso mod and a 1" drain with a 1 1/4" durso standpipe you should be able to flow about 1000gph. Durso and straight drains through overflows are much high through put than an over the back overflow using j tubes.

Schottman!!

[PerryinCA]

I have a SEN900 flowing about 700GPH through a 1", and it does it no prob. I wouldn't worry about putting a few hundred GPH more through it.

P

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Some call it evolution,
And others call it God.
Each In His Own Tongue (1908)
William Herbert Carruth 1859-1924

[Brien]

Perry,

If I read you right 2 overflows with 1" holes should be adequate for a 150 gal sps.

thanks
Brien

[Steve]

Looks like a one inch pipe will have no problem draining 800 GPH. Much of it depends on how large of siphon tubes are being used to get the water from the tank to the drain. There are two overflows CPR makes with the same 1" pipe that drain different amounts because the size of the C siphon is different.
http://www.cprusa.com/products/overflows.html