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Old 12-30-2013, 02:07 PM   #1
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Over flow rating

How can I find the over flow rating for my tank? I need to know so I know what size of pump I need. Thank in advance!
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Old 12-30-2013, 02:35 PM   #2
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What type of overflow do you have? Whats.your tank size ?
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Old 12-30-2013, 02:53 PM   #3
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The tank is a 90 gallon and it's a pre drilled in the one corner
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Old 12-30-2013, 03:05 PM   #4
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I'd look into getting a pump around 1000-1300 gph. The overflow that's made for the tank shouldn't have a problem handling it
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Old 12-30-2013, 03:25 PM   #5
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Ok thanks a lot and if it's to much I could always tone it down with a t valve ...
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Old 12-30-2013, 03:53 PM   #6
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Ok thanks a lot and if it's to much I could always tone it down with a t valve ...
You can yes. 900 gph wouldn't be to far off of the 10 Times filtration because you have to figure in head hight
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Old 12-30-2013, 04:27 PM   #7
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Head height? Please explain.
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Old 12-30-2013, 04:31 PM   #8
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Head height? Please explain.
How high the pump has to push the water, the higher it has to push the water, it slows down the flow rate. So it flows faster 2' high than 4' high, so you have to take into account the 'head' height for the actual flow rate of the pump.
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Old 12-30-2013, 04:31 PM   #9
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The pressure on the pump from trying to push the water up to the tank. In other words it will slow the gph a good bit so you have to make up the difference and get a bigger pump
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Old 12-30-2013, 04:32 PM   #10
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How high the pump has to push the water, the higher it has to push the water, it slows down the flow rate. So it flows faster 2' high than 4' high, so you have to take into account the 'head' height for the actual flow rate of the pump.
Thanks beat me to it
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Old 12-30-2013, 04:35 PM   #11
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Thanks beat me to it
Posted within seconds after me
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Old 12-30-2013, 04:36 PM   #12
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Ok ok ya that makes perfect sense same with bends
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Old 12-30-2013, 04:37 PM   #13
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And since my return line is right beside the entrance tube it's goin to have to make at least 2 elbow bends to make it back at the least
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Old 12-30-2013, 04:38 PM   #14
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If I do put in an elbow should I have it drain back into the pump section of the sump or the entrance to the sump
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Old 12-30-2013, 04:39 PM   #15
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Or even back into the refugium?
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Old 12-30-2013, 04:56 PM   #16
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You lost me on that.. it should go from the sump to the tank.
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Old 12-30-2013, 05:27 PM   #17
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Ya but If I get a larger pump then needed and I want to divert some of the water from going back to the tank where should I have it go? Like what part of te sump should I have the extra water go
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Old 12-30-2013, 06:01 PM   #18
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Now that I understood lol

Back to the sump or the refugium, It doesn't really matter. I would put a control valve on the line from the pump to the tank.
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Old 12-30-2013, 07:21 PM   #19
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Ok. But wouldn't most of the water go back into the sump if I have the valve on the main return since the line going back to the sump would be the path of least resistance?
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Old 12-30-2013, 07:51 PM   #20
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Ok. But wouldn't most of the water go back into the sump if I have the valve on the main return since the line going back to the sump would be the path of least resistance?
Yeah, but you don't want to slow the flow of the pump with a valve, it will shorten the pumps life span. So you keep a ball valve on the line to the tank, and one on the valve going back to the sump. You will simply have to tune the valves right and you will see, once you get it right, it will work great

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