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Old 12-28-2005, 08:24 PM   #1
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How much flow is needed??

It is my first experience with a sump. How much GPH rated pump would I need for a 75g, I will need the water to flow upward to the tank about 4 ft.

Any help is appreciated.
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Old 12-28-2005, 08:47 PM   #2
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http://www.reefcentral.com/calc/hlc2.php

I hope it's okay to link to another forum..If not, I'm sure this'll be deleted...but here you go.
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Old 12-28-2005, 08:48 PM   #3
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A mag 7 or 9.5 should be fine.
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Old 12-28-2005, 08:50 PM   #4
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Also, it depends on wether you are going to use the return for your main flow or not. If all you want to do is return the water to the tank from the sump, then I would just match the overflow rating to the return pump rating (in gph). You could always go a bit larger on the return pump and add a ball valve or gate valve to adjust, but do not exceed over flow rate or it will end up on the floor...
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Old 12-28-2005, 11:21 PM   #5
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Thanks for the link, the mag 7 will give me approx 450gph based on my expected plumbing. I have 2 spare small Rio's that are currently in my 65g that is being dismantled once my new tank has been setup.

Now will this give me too much or not enough water flow?

My return should be okay since I will have 6*6 corner brace w/1.5' bh flowing straight to my sump.
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Old 12-29-2005, 12:15 AM   #6
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Okay..
Rio's are known to fail and I would recommend going with a mag pump, 7 or 9.5,too, as stated by lando.
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