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Old 10-04-2004, 01:25 PM   #21
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"as you need at that poit."

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coincidence?

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54g all-glass bowfront corner planted FW

Red tiger lilly, Rotala Indica, Sagittaria Subulata, Micro Sword, Cardinal Plant
Fluorite Black sand and gravel
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Old 10-04-2004, 01:39 PM   #22
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"coincidence"

hardly!
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Old 10-04-2004, 02:17 PM   #23
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The gph of the overflow will depend on the size of the bulkhead that will fit in the drilled drain hole in your overflow. I wish I could tell you but I don't know the gph relation to the size of the drain. Should be on the net though. A mag pump can be throttled down though so a mag7 would be pretty safe. A 9.5 might work too but I think that would be about the biggest for a single overflow setup unless the tank was specifically designed for a bigger pump. That is a guess though.

If the tank is an AGA tank you could look on their site. I think they have more than one overflow design.
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Old 10-04-2004, 02:26 PM   #24
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Thanks for the help, I am just not sure. This is going to drive me nuts! I am ready to set the sump up, I just dont know what size pump.
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Old 10-04-2004, 03:02 PM   #25
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if I'm correct, the two holes you have drilled, 1-3/4" diameter and 1-1/2" diameter will give you a 1" inner diameter line and a 3/4" inner diamter line, respectively.

The 1" will be your drain line, and I think will handle 300GPH? can someone confirm that for me? It seems low.

the 3/4" line will handle just about whatever you can force through it, the rate of return is dependent on the pump, not so much the plumbing diameter.
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Old 10-04-2004, 03:22 PM   #26
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The 72 gal I have has 2 1" drains and I thought the guy that bulit it had a Mag12 on it. I am pretty sure my 75 has a 1" bulk head and a 3/4" return.
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Old 10-04-2004, 03:55 PM   #27
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here we go! this PDF is on all-glass' site and they rate their system with a 1" drain and a 3/4" return for maximum 600 GPH. Which sounds more like what I was expecting.

so... 600 GPH max, at a 4' head height, you'll want to buy a Mag-7.
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Old 10-04-2004, 04:50 PM   #28
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Awesome Billy! Thanks so much!

Also ellisz thanks to you as well!
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Old 10-04-2004, 06:02 PM   #29
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On my 72g RR, I have a Mag9.5 for mine and it's plumbed with a ball-valve to give me the option to drain some of the return back into the sump. It's also going to be hooked up to a scwd which adds some head.

Don't forget to add the extra head through the plumbing. I can't remember off the top of my head, but a 90deg bend in the plumbing adds quite a bit of head height. If you have room, it's better to use two 45deg bends vs one 90.
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Old 10-05-2004, 11:36 AM   #30
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Should I use the pump in, or out of the water?

I am going with the mag7, I will also use 45 degree angles. Thanks Alot!
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