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Old 03-31-2004, 05:58 AM   #1
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What size return pump?

So im starting my 20g sump/fuge for my exsisting 20g reef. I will be using a siphon overflow box rated at 300g per hr. The return will have to push the water up 3 feet plus at least a couple elbows, I guess. Also I will be wanting a ball valve on the return line right?

What size pump should I get? Any recommendations of good brands to look at? I was thinking a MagDrive? I've heard good things...

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-Mike
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Old 03-31-2004, 09:02 AM   #2
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MagDrives, IMO, are in the top 5 of the greatest pumps made. Silent and extremely reliable.

The smallest Mag is the Mag 500. This pump is designed to pump 500 GPH on a flat plain. You overflow is only designed to handle 300 GPH. Remember, it is always better to make sure your overflow can handle more flow than what your pump can push out. This is so you don't end up with an overflowed tank and water all over the floor because the overflow couldn't "catch up".

However, you may be able to get away with using the 500 since you did say that your head height is 3 feet and you do have a couple of elbows in the return. According to the manufacturer, at a 4' head height, the Mag 5 GPH is 310.

I would wait to get a few more opinions before buying anything...
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Old 03-31-2004, 09:02 AM   #3
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I'd probably go with a mag drive 5
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Old 03-31-2004, 09:35 AM   #4
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Actually, you can get a Mag 2 and Mag 3 as well. I'd probably go with the Mag 5 though. You might have to install a valve on the pressure side in case the flow is a bit too much.
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Old 03-31-2004, 08:01 PM   #5
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Mag 7

I'm running a Mag 7 and using a 300gph overflow. I got the Mag 7 because I estimated my head at more that 6 feet. Even so, I had to throttle the Mag 7 back a bit.

Easier to overestimate on the pump and throttle it back than wish you had purchased more. Make sure you put in a ball valve that enables you to do this, though. Also...make sure you can disconnect the pump easily in case you have to service it.
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Old 03-31-2004, 11:12 PM   #6
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loganJ wrote:

Quote:
Actually, you can get a Mag 2 and Mag 3 as well.
Wow, didn't know they made them that small. Perfect for a nano's...
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Old 04-01-2004, 05:52 AM   #7
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Nice...thanks guys, that pretty much sums it up for me. I will definitely get the Mag 5 and use a ballvalve...no problem!

Now, do you guys use flexible hose from the overflow box to the sump, or PVC? Obviously I will be using PVC on the return line for the ballvalve. Just curious whats what with PVC vs flexible hose.

Also, what size PVC should I use?

Thanks again!
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Old 04-01-2004, 10:45 PM   #8
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1/2" ID

I used 1/2" ID...but I don't know why....it seemed enough.
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Old 04-02-2004, 01:14 PM   #9
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PVC standard, not flexible, 1.5" running about 500 gph in a 55 gal.
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Old 04-02-2004, 02:29 PM   #10
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I have a 90 gallon with a tidepool2. The bulkhead has a barbed fitting for 1" pipe and the return is a barbed 3/4". What size return pump can I run. I don't want to buy too big or too small. The water must travel about 5' vertical and 1' horizontal. Recommendations?
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